Claude Cowork vs Copilot Cowork
Two AI agents now share one name. Which one you can get, what each asks before it acts, and how to check what's gone after it acts.
- Claims
- 106
- Verified at the primary source
- 94
- Removed before publication
- 0
- Last checked
106 claims: 94 verified, 12 executed.
Download this ledger: CSV · JSON · Markdown · CC BY 4.0 · Query it from Claude or ChatGPT
What the essay claims
Before: "Cowork is one product", or "Copilot Cowork is Microsoft's version and I can get it here", or "it asks before deleting anything, so my files are safe". After: two companies ship agents under the same name, and for a UK personal account only Anthropic's is open; both promise to ask before deleting files and both make you responsible for what the agent does; in one documented case the agent asked to delete some temporary files, was allowed, and a script it wrote then removed 15 years of photos from a folder it took for an empty duplicate. Users' bug reports describe local Cowork's delete permission as a switch for the connected folder: one Allow and rm works on any path inside it. So the reader keeps an undo the agent cannot touch, works on copies, and checks the result with a list of names that does not depend on the agent's account.
The claim ladder
What the ladder does not reach: - No row runs either agent. Nothing here measures how often either Cowork deletes something unasked. - No vendor page says whether one Allow in Claude Cowork covers later deletions in the same task; the users' reports describe local sessions only, and no source covers today's cloud sessions. - The incident predates Cowork's move to cloud sessions; the guide does not say today's version would do the same.
| # | Claim | Whose behaviour it measures | Status / scope |
|---|---|---|---|
| 1 | "Cowork" names two products: Anthropic's agent on paid Claude plans and Microsoft's agent in Microsoft 365 | Both vendors' pages | Vendor documentation, 5 Nov 2026 |
| 2 | Microsoft says Copilot Cowork can use Anthropic's Claude models for most reasoning, drafting and tool use, and is limited to Anthropic-supported regions | Microsoft Learn FAQ | Vendor statement |
| 3 | Claude Cowork needs a paid plan (Pro, Max, Ultra, Team, Enterprise); US prices from $17 a month billed yearly; the UK is a supported region | Anthropic's pages | Vendor documentation; US dollar prices before tax |
| 4 | Copilot Cowork for personal accounts is a preview on Microsoft 365 Premium and Pro, only in the US and Canada; at work it needs a licence and IT setup | Microsoft's pages | Vendor documentation |
| 5 | On Pro, Max, Ultra and Team, new Claude Cowork tasks start in "Automatically approve" (Auto in the new experience), where Claude reviews each action; for connector tools that write or delete, "Claude decides"; Enterprise starts in Manual | Anthropic's pages | Vendor documentation; admins can change it |
| 6 | Both vendors say their agent asks before deleting files (Anthropic: "in any mode" on one page, "by default" on another; Microsoft: personal accounts), and both say you are responsible for what it does; Microsoft's FAQ says Copilot Cowork can't delete files in OneDrive or SharePoint | Both vendors' pages | Vendor documentation |
| 6a | In local Cowork, rm fails until Claude is granted delete permission, and after one grant it works on the connected folder | Users' bug reports #79526, #55311 | Two users' reports, local sessions, May and July 2026; not vendor documentation |
| 7 | In Feb 2026 Claude Cowork asked to delete Office temp files, was allowed, and a later script deleted a folder of 15 years of photos it believed was an empty duplicate; iCloud's 30-day recovery of deleted files brought them back | Davidov's posts and screenshot; AIID | One user's account with a screenshot of the agent's own log; Cowork has since changed (cloud sessions on personal plans) |
| 8 | On a Mac's usual disk, "photos" and "Photos" are one folder | Our run on one Mac (APFS, not case-sensitive) and the agent's own words in the screenshot | One machine |
| 9 | The check names 41 files gone on the incident's shape (1 deletion approved), only the approved lock file on a correct tidy, and the substituted files when the wrong ones go | Our run, 5 Nov 2026, demo/reader-recipe-v2.sh (bash and zsh) | A shell replay of the shape and three probes; no agent was run |
| 10 | OneDrive keeps deleted files 30 days on personal accounts and 93 on work accounts unless an admin changed it | Microsoft Support | Vendor documentation |
The guide compares from the vendors' own pages, reads one incident at its primary, and demonstrates one check. It does not test the products.
What would make it wrong
The guide is wrong if the delete prompt shows you every file before it goes. Two things would show it: - A vendor documents that every deletion is shown to the user with its target before it runs, including deletions inside scripts, and an independent test confirms it. - Reports of agents deleting files the user never saw named stop appearing once both vendors' delete protection is in place.
Either would move the check from a guard to a habit.
On the track record, not yet testable2 untestedThe re-check
The evidence, row by row
Each row is a claim the essay makes, then the evidence recorded for it and the source it was checked against. For verified rows that is usually the exact words, where they sit and the day they were read. The label says how far it was checked.
What the labels mean
- Verified
- Checked against the primary source itself by a checker who did not draft the piece, usually with the exact words, where they sit and the date read.
- Executed
- A run or observation done for the piece: code, a query, a count, or a check made live in an app. The claim is what it returned. Run records are not published.
- Checked
- Checked against its source by a separate checker in the older ledger format, which recorded no quote, locator or date.
- Reported
- Not verified word for word against a primary source: carried from a secondary source, from one that could not be opened in full, or supported only in part. The essay words it accordingly.
- Struck
- Drafted, checked and removed before publication. Kept here, crossed out, with the reason.
- Excluded
- Considered and deliberately left out of the piece. Kept here with the reason.
Sources (9)
- Claude 40 rows
- Microsoft Learn 9 rows
- Microsoft Support 24 rows
- Anthropic 2 rows
- Nick Davidov on X 13 rows
- anthropics/claude-code issue #79526 3 rows
- Apple 2 rows
- Ars Technica 1 row
- Our run 12 rows
-
Claude Cowork brings Claude Code's agentic abilities to work beyond coding
"brings Claude Code's agentic capabilities to knowledge work beyond coding"
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · intro, para 1 · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), intro, para 1, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 1, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-1 (source read 2026-11-05). -
Claude Cowork runs tasks in the cloud on Anthropic's servers (new tasks on Pro, Max and Ultra; on Team by default; off by default on Enterprise, see the cloud-session rows)
"Cowork runs your tasks in the cloud. Claude's work runs on Anthropic's servers, in an isolated environment, and your sessions and files are saved to your Claude account."
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · How Claude Cowork runs your tasks, para 1 · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), How Claude Cowork runs your tasks, para 1, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 2, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-2 (source read 2026-11-05). -
It reaches your computer only through the desktop app and only for folders you connect
"When a task needs a local file or your browser, Claude reaches your computer through the Claude Desktop app, and only for the folders you've connected."
Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026) · Where your task runs, para 1 · support.claude.com
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Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026), Where your task runs, para 1, https://support.claude.com/en/articles/13364135-use-claude-cowork-safely. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 3, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-3 (source read 2026-11-05). -
Anthropic's first example task is a tidy-up
"Organize my Downloads folder by type and date"
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Example use cases > File and document management > Organize files · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Example use cases > File and document management > Organize files, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 4, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-4 (source read 2026-11-05). -
Copilot Cowork, in Microsoft's words
"Cowork helps you get work done by completing complex, coordinated actions across your apps, files, and data."
Microsoft Learn, Copilot Cowork FAQ · Copilot Chat vs Cowork answer · learn.microsoft.com
LinkReport an errorCite
Microsoft Learn, Copilot Cowork FAQ, Copilot Chat vs Cowork answer, https://learn.microsoft.com/en-us/microsoft-365/copilot/cowork/cowork-faq. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 5, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-5 (source read 2026-11-05). -
Copilot Cowork creates and edits Office files and PDFs
"Create and edit Word documents, Excel spreadsheets, PowerPoint presentations, and PDFs."
Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview) · What you can do with Cowork, bullet 1 · support.microsoft.com
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Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview), What you can do with Cowork, bullet 1, https://support.microsoft.com/en-us/microsoft-365-copilot/get-started-with-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 6, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-6 (source read 2026-11-05). -
It handles email and calendar
"Draft, reply to, and send email, and manage your calendar."
Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview) · What you can do with Cowork, bullet 2 · support.microsoft.com
LinkReport an errorCite
Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview), What you can do with Cowork, bullet 2, https://support.microsoft.com/en-us/microsoft-365-copilot/get-started-with-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 7, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-7 (source read 2026-11-05). -
It manages your OneDrive files
"Manage your files in OneDrive."
Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview) · What you can do with Cowork, bullet 3 · support.microsoft.com
LinkReport an errorCite
Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview), What you can do with Cowork, bullet 3, https://support.microsoft.com/en-us/microsoft-365-copilot/get-started-with-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 8, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-8 (source read 2026-11-05). -
It runs prompts on a schedule
"Run prompts on a schedule so recurring tasks happen automatically."
Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview) · What you can do with Cowork, bullet 6 · support.microsoft.com
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Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview), What you can do with Cowork, bullet 6, https://support.microsoft.com/en-us/microsoft-365-copilot/get-started-with-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 9, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-9 (source read 2026-11-05). -
Copilot Cowork runs in the browser and the Copilot desktop app (the address is not named: Microsoft's pages disagree)
"Cowork runs in your browser at m365.cloud.microsoft and in the Microsoft Copilot desktop app."
Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview) · Set up Cowork, para 1 · support.microsoft.com
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Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview), Set up Cowork, para 1, https://support.microsoft.com/en-us/microsoft-365-copilot/get-started-with-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 10, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-10 (source read 2026-11-05). -
Copilot Cowork on mobile
"On the Microsoft Copilot mobile app for iOS and Android devices"
Microsoft Learn, Copilot Cowork FAQ · Where can I use Cowork, mobile bullet · learn.microsoft.com
LinkReport an errorCite
Microsoft Learn, Copilot Cowork FAQ, Where can I use Cowork, mobile bullet, https://learn.microsoft.com/en-us/microsoft-365/copilot/cowork/cowork-faq. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 11, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-11 (source read 2026-11-05). -
Personal accounts are a preview; work accounts are generally available
"Cowork for work or school accounts is generally available"
Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview) · Set up Cowork, Note · support.microsoft.com
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Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview), Set up Cowork, Note, https://support.microsoft.com/en-us/microsoft-365-copilot/get-started-with-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 12, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-12 (source read 2026-11-05). -
Copilot Cowork can use Anthropic's Claude models for most of its reasoning
"Cowork can use Anthropic Claude models as a subprocessor for most reasoning, drafting, and tool-using work."
Microsoft Learn, Copilot Cowork FAQ · Does Cowork connect to external models for processing? · learn.microsoft.com
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Microsoft Learn, Copilot Cowork FAQ, Does Cowork connect to external models for processing?, https://learn.microsoft.com/en-us/microsoft-365/copilot/cowork/cowork-faq. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 13, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-13 (source read 2026-11-05). -
So Copilot Cowork is limited to Anthropic-supported regions
"Cowork isn't an exception, and use and access is currently limited to Anthropic-supported regions."
Microsoft Learn, Copilot Cowork FAQ · Are there unsupported regions? · learn.microsoft.com
LinkReport an errorCite
Microsoft Learn, Copilot Cowork FAQ, Are there unsupported regions?, https://learn.microsoft.com/en-us/microsoft-365/copilot/cowork/cowork-faq. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 14, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-14 (source read 2026-11-05). -
Claude Cowork needs a paid plan
"Cowork is available to paid Claude plans (Pro, Max, Ultra, Team, Enterprise) only."
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Requirements, Paid Claude subscription · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Requirements, Paid Claude subscription, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 15, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-15 (source read 2026-11-05). -
Pro's US price
"$17 Per month with annual subscription discount ( $200 billed up front). $20 if billed monthly."
Claude, Plans and pricing · Pro card (the page prints a space after the bracket) · claude.com
LinkReport an errorCite
Claude, Plans and pricing, Pro card (the page prints a space after the bracket), https://claude.com/pricing. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 16, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-16 (source read 2026-11-05). -
Max's US price
"Max For all-day work $100 Per month"
Claude, Plans and pricing · Max card · claude.com
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Claude, Plans and pricing, Max card, https://claude.com/pricing. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 17, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-17 (source read 2026-11-05). -
Ultra's US price
"Ultra For your longest tasks $200 Per month"
Claude, Plans and pricing · Ultra card · claude.com
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Claude, Plans and pricing, Ultra card, https://claude.com/pricing. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 18, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-18 (source read 2026-11-05). -
Team standard seat US price
"$20 Per seat / month if billed annually. $25 if billed monthly."
Claude, Plans and pricing · Team, Standard seat · claude.com
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Claude, Plans and pricing, Team, Standard seat, https://claude.com/pricing. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 19, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-19 (source read 2026-11-05). -
Prices exclude tax
"Prices shown don’t include applicable tax."
Claude, Plans and pricing · below the plan cards · claude.com
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Claude, Plans and pricing, below the plan cards, https://claude.com/pricing. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 20, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-20 (source read 2026-11-05). -
The UK is a supported region for Anthropic's products
"United Kingdom"
Anthropic, Supported countries and regions · country list (U) · anthropic.com
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Anthropic, Supported countries and regions, country list (U), https://www.anthropic.com/legal/supported-regions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 21, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-21 (source read 2026-11-05). -
The desktop app runs on macOS, Windows and Linux (beta), on all paid plans
"Claude Desktop for macOS, Windows, and Linux (beta) : Available on all paid plans."
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Availability, bullet 1 · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Availability, bullet 1, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 22, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-22 (source read 2026-11-05). -
Web and mobile: Pro, Max, Ultra and Team (beta on Team); Enterprise when an owner enables it
"Web and Claude Mobile: Pro, Max, Ultra, and Team plans (in beta on Team), and Enterprise plans when an owner enables it."
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Availability, bullet 2 · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Availability, bullet 2, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 23, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-23 (source read 2026-11-05). -
Local files, browser use and computer use need the desktop app for macOS or Windows, open
"For local file access, browser use, and computer use: The Claude Desktop app for macOS or Windows, open and connected."
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Requirements, bullet 2 · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Requirements, bullet 2, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 24, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-24 (source read 2026-11-05). -
Multi-step tasks use more of your allowance
"Multi-step tasks, like ones that run code, create files, or use your connected apps and browser, use more of your usage than a quick question."
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Usage limits · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Usage limits, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 25, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-25 (source read 2026-11-05). -
Copilot Cowork on personal plans: Premium limited usage, Pro highest usage, not on Personal or Family
"Cowork (in preview)* Not available Not available Limited usage Highest usage"
Microsoft Support, AI credits and limits for Microsoft 365 subscriptions · Limits for each plan table, Cowork row (columns Personal, Family, Premium, Pro) · support.microsoft.com
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Microsoft Support, AI credits and limits for Microsoft 365 subscriptions, Limits for each plan table, Cowork row (columns Personal, Family, Premium, Pro), https://support.microsoft.com/en-us/microsoft-365-copilot/ai-credits-and-limits-for-microsoft-365-subscriptions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 26, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-26 (source read 2026-11-05). -
The personal plans' Cowork is only in the US and Canada (the table covers subscriptions for individuals)
"*Currently only available in the US and Canada. Availability varies by platform and device."
Microsoft Support, AI credits and limits for Microsoft 365 subscriptions · footnote under the table · support.microsoft.com
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Microsoft Support, AI credits and limits for Microsoft 365 subscriptions, footnote under the table, https://support.microsoft.com/en-us/microsoft-365-copilot/ai-credits-and-limits-for-microsoft-365-subscriptions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 27, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-27 (source read 2026-11-05). -
Personal and Family subscribers lose Cowork
"If you have a Personal or Family subscription, you will lose access to Cowork."
Microsoft Support, Updates to Copilot and the Microsoft Copilot app · Copilot Tasks transition, Subscription access · support.microsoft.com
LinkReport an errorCite
Microsoft Support, Updates to Copilot and the Microsoft Copilot app, Copilot Tasks transition, Subscription access, https://support.microsoft.com/en-us/microsoft-365-copilot/learning/changes-microsoft-copilot-app. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 28, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-28 (source read 2026-11-05). -
At work it needs a licence, Cowork enabled and billing set up
"Make sure you have a Microsoft Copilot license, Cowork enabled in your Microsoft Copilot environment, and usage-based and Cowork billing enabled."
Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview) · For work or school accounts · support.microsoft.com
LinkReport an errorCite
Microsoft Support, Get started with Microsoft Copilot Cowork for personal accounts (Preview), For work or school accounts, https://support.microsoft.com/en-us/microsoft-365-copilot/get-started-with-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 29, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-29 (source read 2026-11-05). -
Claude Cowork has three modes for when it asks (the new experience shows two settings, Auto and Manual)
"Cowork has three modes that control when Claude asks your permission before taking an action"
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Choose how Claude checks with you, para 1 · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Choose how Claude checks with you, para 1, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 30, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-30 (source read 2026-11-05). -
New tasks start in Automatically approve on Pro, Max, Ultra and Team; off on Enterprise (default; not executable: service-side product behaviour, read from the vendor's own help page)
"It’s on by default on Pro, Max, Ultra, and Team plans, and off by default on Enterprise plans."
Claude Help, Use Claude Cowork on Team and Enterprise plans · Auto mode availability, second setting; not executable: service-side product behaviour, read from the vendor's own help page · support.claude.com
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Claude Help, Use Claude Cowork on Team and Enterprise plans, Auto mode availability, second setting; not executable: service-side product behaviour, read from the vendor's own help page, https://support.claude.com/en/articles/13455879-use-claude-cowork-on-team-and-enterprise-plans. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 31, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-31 (source read 2026-11-05). -
In the new experience, Auto is the default on personal and Team plans (default; not executable: service-side product behaviour, read from the vendor's own help page)
"Auto (default on Pro, Max, Ultra, and Team plans) and Manual (default on Enterprise plans)"
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Choose how Claude checks with you, Note; not executable: service-side product behaviour, read from the vendor's own help page · support.claude.com
LinkReport an errorCite
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Choose how Claude checks with you, Note; not executable: service-side product behaviour, read from the vendor's own help page, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 32, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-32 (source read 2026-11-05). -
Manual: Claude pauses and asks
"Claude pauses and asks for approval for actions. You review each request and choose Allow or Deny."
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Manually approve (Manual) · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Manually approve (Manual), https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 33, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-33 (source read 2026-11-05). -
Auto: Claude reviews each action and blocks what it judges unsafe
"Claude reviews each action for safety (such as checking for data exfiltration or prompt injection ) and automatically blocks anything it determines to be unsafe."
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Automatically approve (Auto) · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Automatically approve (Auto), https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 34, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-34 (source read 2026-11-05). -
In Auto, Claude decides for connector tools that write or delete, unless they are set to Blocked (the connector-tool permission table)
"For write/delete tools, Claude decides"
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · mode table, Auto row · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), mode table, Auto row, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 35, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-35 (source read 2026-11-05). -
Skip: nothing checks
"Claude doesn't pause to ask and nothing checks its actions automatically."
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Skip all approvals (Skip) · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Skip all approvals (Skip), https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 36, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-36 (source read 2026-11-05). -
Claude asks before permanently deleting files, in any mode
"Claude always asks before permanently deleting files, in any mode."
Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026) · 4. Match your oversight to the stakes, para 1 · support.claude.com
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Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026), 4. Match your oversight to the stakes, para 1, https://support.claude.com/en/articles/13364135-use-claude-cowork-safely. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 37, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-37 (source read 2026-11-05). -
The delete prompt needs Allow
"You will see a permission prompt and will need to select "Allow" before Claude is allowed to perform deletion tasks."
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Deletion protection · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Deletion protection, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 38, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-38 (source read 2026-11-05). -
Computer use skips the permission checks
"Be especially cautious with computer use—Claude clicks, types, and navigates your screen directly, without the permission checks that gate other Cowork tools."
Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026) · To minimize risks, last bullet · support.claude.com
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Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026), To minimize risks, last bullet, https://support.claude.com/en/articles/13364135-use-claude-cowork-safely. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 39, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-39 (source read 2026-11-05). -
Anthropic's own advice for real consequences
"For work with real consequences—money, messages sent as you, important files—stay close and review what Claude does"
Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026) · Automatically approve, para 2 · support.claude.com
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Claude Help, Get started with Claude Cowork (updated this week as of 5 Nov 2026), Automatically approve, para 2, https://support.claude.com/en/articles/13345190-get-started-with-claude-cowork. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 40, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-40 (source read 2026-11-05). -
Anthropic: you remain responsible
"You remain responsible for all actions taken by Claude performed on your behalf."
Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026) · Your responsibility · support.claude.com
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Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026), Your responsibility, https://support.claude.com/en/articles/13364135-use-claude-cowork-safely. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 42, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-42 (source read 2026-11-05). -
Copilot Cowork asks before some actions, including writing files
"Before Cowork takes certain actions, including writing files, it asks for your permission."
Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview) · para 1 · support.microsoft.com
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Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview), para 1, https://support.microsoft.com/en-us/microsoft-365-copilot/cowork-take-control-actions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 43, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-43 (source read 2026-11-05). -
Its approval list includes deleting files
"Account altering actions , including deleting files, modifying cloud storage, canceling subscriptions, or changing account settings."
Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview) · When is user approval required?, bullet 4 · support.microsoft.com
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Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview), When is user approval required?, bullet 4, https://support.microsoft.com/en-us/microsoft-365-copilot/cowork-take-control-actions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 44, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-44 (source read 2026-11-05). -
Its approval list includes money
"Monetary transactions , such as completing a purchase or submitting payment."
Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview) · When is user approval required?, bullet 1 · support.microsoft.com
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Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview), When is user approval required?, bullet 1, https://support.microsoft.com/en-us/microsoft-365-copilot/cowork-take-control-actions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 45, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-45 (source read 2026-11-05). -
Its approval list includes acting toward other people
"Actions involving other people , such as sending emails or messages."
Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview) · When is user approval required?, bullet 3 · support.microsoft.com
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Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview), When is user approval required?, bullet 3, https://support.microsoft.com/en-us/microsoft-365-copilot/cowork-take-control-actions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 46, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-46 (source read 2026-11-05). -
Scheduled tasks can take approvals at setup and run unattended
"For scheduled or recurring tasks, Copilot may ask for required approvals during setup so the task can run unattended in the future."
Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview) · When is user approval required?, last para · support.microsoft.com
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Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview), When is user approval required?, last para, https://support.microsoft.com/en-us/microsoft-365-copilot/cowork-take-control-actions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 47, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-47 (source read 2026-11-05). -
You can pause or cancel
"You can also pause Cowork at any time (to finish the current step, or immediately), resume when you're ready, or cancel the task entirely."
Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview) · Approve actions · support.microsoft.com
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Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview), Approve actions, https://support.microsoft.com/en-us/microsoft-365-copilot/cowork-take-control-actions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 48, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-48 (source read 2026-11-05). -
Microsoft: you are responsible
"You are responsible for actions Copilot takes on your behalf."
Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview) · Important box · support.microsoft.com
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Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview), Important box, https://support.microsoft.com/en-us/microsoft-365-copilot/cowork-take-control-actions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 49, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-49 (source read 2026-11-05). -
The local browser uses your own sign-ins
"The remote browser runs separately from your device, while the local browser uses Microsoft Edge and the sites you're already signed in to."
Microsoft Support, Updates to Copilot and the Microsoft Copilot app · Copilot Tasks transition, Browser · support.microsoft.com
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Microsoft Support, Updates to Copilot and the Microsoft Copilot app, Copilot Tasks transition, Browser, https://support.microsoft.com/en-us/microsoft-365-copilot/learning/changes-microsoft-copilot-app. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 50, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-50 (source read 2026-11-05). -
Davidov asked Claude Cowork to organise his wife's desktop; it asked to delete temp Office files; he allowed it
"Asked Claude Cowork organize my wife’s desktop, it stated doing it, asked for a permission to delete temp office files, I granted it, and then it goes “ooops”."
Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post) · post text, sentence 1 (read via X's public embed endpoint; saved as JSON) · x.com
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Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post), post text, sentence 1 (read via X's public embed endpoint; saved as JSON), https://x.com/Nick_Davidov/status/2019982510478995782. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 51, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-51 (source read 2026-11-05). -
The screenshot shows the delete request for Office temp lock files
"Attempted to delete Office temp lock files from Desktop"
Nick Davidov on X, screenshot attached to the 15:03 UTC reply (Claude Cowork's own account of the error) · screenshot, step 1 (read by eye; transcript in sources) · x.com
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Nick Davidov on X, screenshot attached to the 15:03 UTC reply (Claude Cowork's own account of the error), screenshot, step 1 (read by eye; transcript in sources), https://x.com/Nick_Davidov/status/2020151363229900835. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 54, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-54 (source read 2026-11-05). -
Cowork said it needed delete permission first
"I need to request delete permission first."
Nick Davidov on X, screenshot attached to the 15:03 UTC reply (Claude Cowork's own account of the error) · screenshot, line 2 · x.com
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Nick Davidov on X, screenshot attached to the 15:03 UTC reply (Claude Cowork's own account of the error), screenshot, line 2, https://x.com/Nick_Davidov/status/2020151363229900835. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 55, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-55 (source read 2026-11-05). -
Cowork's own account: the case-insensitive merge
"When I tried to merge the lowercase "photos" folder with a new "Photos" folder, I didn't account for your Mac's case-insensitive filesystem"
Nick Davidov on X, screenshot attached to the 15:03 UTC reply (Claude Cowork's own account of the error) · screenshot, last paragraph · x.com
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Nick Davidov on X, screenshot attached to the 15:03 UTC reply (Claude Cowork's own account of the error), screenshot, last paragraph, https://x.com/Nick_Davidov/status/2020151363229900835. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 56, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-56 (source read 2026-11-05). -
Cowork's own account: rm -rf on what it took for an empty folder
"My script ran rm -rf on what it thought was a separate empty folder, but it actually deleted your existing "photos" directory and its contents."
Nick Davidov on X, screenshot attached to the 15:03 UTC reply (Claude Cowork's own account of the error) · screenshot, last paragraph; also quoted by Futurism para 6 · x.com
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Nick Davidov on X, screenshot attached to the 15:03 UTC reply (Claude Cowork's own account of the error), screenshot, last paragraph; also quoted by Futurism para 6, https://x.com/Nick_Davidov/status/2020151363229900835. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 57, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-57 (source read 2026-11-05). -
The screenshot's model picker shows Opus 4.6
"Opus 4.6"
Nick Davidov on X, screenshot attached to the 15:03 UTC reply (Claude Cowork's own account of the error) · screenshot, model picker in the reply box · x.com
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Nick Davidov on X, screenshot attached to the 15:03 UTC reply (Claude Cowork's own account of the error), screenshot, model picker in the reply box, https://x.com/Nick_Davidov/status/2020151363229900835. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 58, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-58 (source read 2026-11-05). -
Since 6 Oct, new desktop tasks on Pro, Max and Ultra run in the cloud
"On Pro, Max, and Ultra plans, new tasks you start on desktop run in the cloud too"
Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026) · 9. Understand what sessions in the cloud can reach · support.claude.com
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Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026), 9. Understand what sessions in the cloud can reach, https://support.claude.com/en/articles/13364135-use-claude-cowork-safely. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 62, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-62 (source read 2026-11-05). -
Anthropic's advice: a dedicated folder and backups
"Consider creating a dedicated working folder for Claude rather than granting broad access, and keep backups of important files."
Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026) · 1. Be selective about file access · support.claude.com
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Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026), 1. Be selective about file access, https://support.claude.com/en/articles/13364135-use-claude-cowork-safely. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 63, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-63 (source read 2026-11-05). -
OneDrive restore windows
"For personal accounts, you can restore files or folders deleted within the last 30 days. For work or school accounts, you can restore files or folders deleted within the last 93 days, unless your administrator changed the retention setting."
Microsoft Support, Restore deleted files or folders in OneDrive · para 3 · support.microsoft.com
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Microsoft Support, Restore deleted files or folders in OneDrive, para 3, https://support.microsoft.com/en-us/office/restore-deleted-files-or-folders-in-onedrive-949ada80-0026-4db3-a953-c99083e6a84f. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 65, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-65 (source read 2026-11-05). -
No restore after the recycle bin is emptied
"You can't restore files or folders after they've been permanently deleted from the OneDrive recycle bin."
Microsoft Support, Restore deleted files or folders in OneDrive · para 4 · support.microsoft.com
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Microsoft Support, Restore deleted files or folders in OneDrive, para 4, https://support.microsoft.com/en-us/office/restore-deleted-files-or-folders-in-onedrive-949ada80-0026-4db3-a953-c99083e6a84f. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 66, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-66 (source read 2026-11-05). -
Team/Enterprise: Cowork on by default; owners can disable
"Claude Cowork is on by default, but organization owners can manually disable it."
Claude Help, Use Claude Cowork on Team and Enterprise plans · Admin controls · support.claude.com
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Claude Help, Use Claude Cowork on Team and Enterprise plans, Admin controls, https://support.claude.com/en/articles/13455879-use-claude-cowork-on-team-and-enterprise-plans. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 67, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-67 (source read 2026-11-05). -
Admins control whether Automatically approve is offered
"Allow "Automatically approve" mode controls whether members can use the mode. This setting is on by default"
Claude Help, Use Claude Cowork on Team and Enterprise plans · Auto mode availability, first setting; not executable: service-side product behaviour, read from the vendor's own help page · support.claude.com
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Claude Help, Use Claude Cowork on Team and Enterprise plans, Auto mode availability, first setting; not executable: service-side product behaviour, read from the vendor's own help page, https://support.claude.com/en/articles/13455879-use-claude-cowork-on-team-and-enterprise-plans. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 68, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-68 (source read 2026-11-05). -
Local sessions keep history on the user's computer, which admins cannot centrally manage or delete
"For local sessions, Cowork stores conversation history on users' computers. This data is not subject to Anthropic's standard data retention policies , and admins cannot centrally manage or delete it."
Claude Help, Use Claude Cowork on Team and Enterprise plans · Monitoring > Local conversation storage · support.claude.com
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Claude Help, Use Claude Cowork on Team and Enterprise plans, Monitoring > Local conversation storage, https://support.claude.com/en/articles/13455879-use-claude-cowork-on-team-and-enterprise-plans. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 69, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-69 (source read 2026-11-05). -
Enterprise admins can retrieve it through the Compliance API
"Claude Enterprise admins can retrieve this content through the Compliance API."
Claude Help, Use Claude Cowork on Team and Enterprise plans · Monitoring > Local conversation storage · support.claude.com
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Claude Help, Use Claude Cowork on Team and Enterprise plans, Monitoring > Local conversation storage, https://support.claude.com/en/articles/13455879-use-claude-cowork-on-team-and-enterprise-plans. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 70, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-70 (source read 2026-11-05). -
Microsoft admins can switch off Anthropic models
"Administrators can disable models, including Anthropic models , for their organization in the Microsoft 365 admin center under Copilot settings."
Microsoft Learn, Copilot Cowork FAQ · admin controls, Turn off individual models · learn.microsoft.com
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Microsoft Learn, Copilot Cowork FAQ, admin controls, Turn off individual models, https://learn.microsoft.com/en-us/microsoft-365/copilot/cowork/cowork-faq. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 71, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-71 (source read 2026-11-05). -
The approval box previews the plan and names its button for the action
"The approval dialog shows a preview of what Cowork plans to do and a button labeled with the specific action."
Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview) · Approve actions, para 1 · support.microsoft.com
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Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview), Approve actions, para 1, https://support.microsoft.com/en-us/microsoft-365-copilot/cowork-take-control-actions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 72, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-72 (source read 2026-11-05). -
Its approval list includes sending personal details to websites
"Submitting personal information to external websites, such as names, addresses, or phone numbers."
Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview) · When is user approval required?, bullet 2 · support.microsoft.com
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Microsoft Support, Take control of Microsoft Copilot Cowork actions before they run (Preview), When is user approval required?, bullet 2, https://support.microsoft.com/en-us/microsoft-365-copilot/cowork-take-control-actions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 73, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-73 (source read 2026-11-05). -
The remote browser is not here yet; web tasks use local Edge
"The remote browser is coming soon. For now, you can use the local browser in Microsoft Edge."
Microsoft Support, Updates to Copilot and the Microsoft Copilot app · Copilot Tasks transition, Browser · support.microsoft.com
LinkReport an errorCite
Microsoft Support, Updates to Copilot and the Microsoft Copilot app, Copilot Tasks transition, Browser, https://support.microsoft.com/en-us/microsoft-365-copilot/learning/changes-microsoft-copilot-app. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 74, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-74 (source read 2026-11-05). -
Team and Enterprise can run local sessions: the work runs on the user's computer, its code in an isolated VM
"Local sessions: Claude's work runs on the user’s computer, with code in an isolated virtual machine."
Claude Help, Use Claude Cowork on Team and Enterprise plans · Where Cowork runs, bullet 2 · support.claude.com
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Claude Help, Use Claude Cowork on Team and Enterprise plans, Where Cowork runs, bullet 2, https://support.claude.com/en/articles/13455879-use-claude-cowork-on-team-and-enterprise-plans. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 76, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-76 (source read 2026-11-05). -
Microsoft limits services using Anthropic models to Anthropic-supported regions
"Access to use Anthropic models through Microsoft services is limited to the regions that Anthropic currently supports ."
Microsoft Learn, Copilot Cowork FAQ · Are there unsupported regions? · learn.microsoft.com
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Microsoft Learn, Copilot Cowork FAQ, Are there unsupported regions?, https://learn.microsoft.com/en-us/microsoft-365/copilot/cowork/cowork-faq. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 77, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-77 (source read 2026-11-05). -
The 15 years, in Davidov's own post
"accidentally deleted a folder with all of the photos my wife made on her camera for the last 15 years. All photos of kids, their illustrations, friends’ weddings, travel, everything."
Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post, full text via the fxtwitter mirror of X) · post text, sentence 2 · x.com
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Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post, full text via the fxtwitter mirror of X), post text, sentence 2, https://x.com/Nick_Davidov/status/2019982510478995782. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 79, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-79 (source read 2026-11-05). -
It was done in Terminal and was not in the trash
"It’s not in trash, it was done via terminal"
Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post, full text via the fxtwitter mirror of X) · post text, line 3 · x.com
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Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post, full text via the fxtwitter mirror of X), post text, line 3, https://x.com/Nick_Davidov/status/2019982510478995782. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 80, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-80 (source read 2026-11-05). -
iCloud had already synced the change
"It’s not in iCloud, it already synced the new file structure."
Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post, full text via the fxtwitter mirror of X) · post text, line 4 · x.com
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Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post, full text via the fxtwitter mirror of X), post text, line 4, https://x.com/Nick_Davidov/status/2019982510478995782. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 81, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-81 (source read 2026-11-05). -
Apple pointed him to iCloud's 30-day recovery of deleted files
"I called Apple and they pointed me to a feature in iCloud allowing to retrieve files that were saved before but are no longer on iCloud Drive (they keep them for 30 days)."
Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post, full text via the fxtwitter mirror of X) · post text, line 7 · x.com
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Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post, full text via the fxtwitter mirror of X), post text, line 7, https://x.com/Nick_Davidov/status/2019982510478995782. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 83, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-83 (source read 2026-11-05). -
He watched tens of thousands of files come back
"I’m now watching it load tens of thousands of files."
Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post, full text via the fxtwitter mirror of X) · post text, line 8 · x.com
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Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post, full text via the fxtwitter mirror of X), post text, line 8, https://x.com/Nick_Davidov/status/2019982510478995782. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 84, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-84 (source read 2026-11-05). -
His own rule
"Don’t let it touch anything that is hard to repair."
Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post, full text via the fxtwitter mirror of X) · post text, last line · x.com
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Nick Davidov on X, 7 Feb 2026 03:52 UTC (first post, full text via the fxtwitter mirror of X), post text, last line, https://x.com/Nick_Davidov/status/2019982510478995782. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 85, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-85 (source read 2026-11-05). -
Users report: in local Cowork, rm fails until delete permission is granted
"rm in the bash sandbox keeps failing with Operation not permitted (expected before permission is granted)"
anthropics/claude-code issue #79526 (user report, 20 Jul 2026, closed) · What's Wrong?, para 2 · github.com
LinkReport an errorCite
anthropics/claude-code issue #79526 (user report, 20 Jul 2026, closed), What's Wrong?, para 2, https://github.com/anthropics/claude-code/issues/79526. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 86, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-86 (source read 2026-11-05). -
Users report: the reproduction is an attempted rm, then Claude asks for the permission
"Ask Claude to delete a file inside it. rm fails with Operation not permitted (expected), so Claude calls allow_cowork_file_delete with the VM path."
anthropics/claude-code issue #79526 (user report, 20 Jul 2026, closed) · Steps to reproduce, step 3 · github.com
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anthropics/claude-code issue #79526 (user report, 20 Jul 2026, closed), Steps to reproduce, step 3, https://github.com/anthropics/claude-code/issues/79526. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 87, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-87 (source read 2026-11-05). -
Users report: after one grant, rm works
"allow_cowork_file_delete succeeds and rm works afterwards."
anthropics/claude-code issue #79526 (user report, 20 Jul 2026, closed) · Supporting evidence, bullet 1 · github.com
LinkReport an errorCite
anthropics/claude-code issue #79526 (user report, 20 Jul 2026, closed), Supporting evidence, bullet 1, https://github.com/anthropics/claude-code/issues/79526. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 88, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-88 (source read 2026-11-05). -
Anthropic's newer page: asks before permanent deletion by default
"by default it asks before permanently deleting any files."
Claude Help, Claude Cowork and chat are one Claude · para on local files and computer use · support.claude.com
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Claude Help, Claude Cowork and chat are one Claude, para on local files and computer use, https://support.claude.com/en/articles/16761823-claude-cowork-and-chat-are-one-claude. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 91, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-91 (source read 2026-11-05). -
Connected folders are listed under Trusted folders
"Folders you gave Cowork access to are listed under Trusted folders ."
Claude Help, Claude Cowork and chat are one Claude · Files · support.claude.com
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Claude Help, Claude Cowork and chat are one Claude, Files, https://support.claude.com/en/articles/16761823-claude-cowork-and-chat-are-one-claude. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 92, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-92 (source read 2026-11-05). -
iCloud.com recovers deleted files for 30 days
"On iCloud.com, you can recover files deleted from both iCloud Drive and other apps within the last 30 days"
Apple, iCloud User Guide, Recover deleted files on iCloud.com · para 1 · support.apple.com
LinkReport an errorCite
Apple, iCloud User Guide, Recover deleted files on iCloud.com, para 1, https://support.apple.com/guide/icloud/recover-deleted-files-mmae56ea1ca5/icloud. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 94, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-94 (source read 2026-11-05). -
Prior art: agents act on wrong internal pictures of the file system
"generate incorrect internal representations of what’s happening on your computer"
Ars Technica (Benj Edwards), 24 Jul 2025 · body, para 1 · arstechnica.com
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Ars Technica (Benj Edwards), 24 Jul 2025, body, para 1, https://arstechnica.com/information-technology/2025/07/ai-coding-assistants-chase-phantoms-destroy-real-user-data/. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 96, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-96 (source read 2026-11-05). -
Cloud sessions are off by default on Enterprise
"Enterprise plans: off by default. An owner turns on "Run Cowork in the cloud,""
Claude Help, Use Claude Cowork on Team and Enterprise plans · Enable or disable sessions in the cloud · support.claude.com
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Claude Help, Use Claude Cowork on Team and Enterprise plans, Enable or disable sessions in the cloud, https://support.claude.com/en/articles/13455879-use-claude-cowork-on-team-and-enterprise-plans. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 99, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-99 (source read 2026-11-05). -
Cloud sessions are on by default on Team
"Team plans: on by default."
Claude Help, Use Claude Cowork on Team and Enterprise plans · Enable or disable sessions in the cloud · support.claude.com
LinkReport an errorCite
Claude Help, Use Claude Cowork on Team and Enterprise plans, Enable or disable sessions in the cloud, https://support.claude.com/en/articles/13455879-use-claude-cowork-on-team-and-enterprise-plans. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 100, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-100 (source read 2026-11-05). -
Microsoft: Copilot Cowork can't delete OneDrive or SharePoint files
"Cowork can't delete files or folders in OneDrive or SharePoint."
Microsoft Learn, Copilot Cowork FAQ · Are there known limitations? · learn.microsoft.com
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Microsoft Learn, Copilot Cowork FAQ, Are there known limitations?, https://learn.microsoft.com/en-us/microsoft-365/copilot/cowork/cowork-faq. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 101, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-101 (source read 2026-11-05). -
Microsoft: it can't touch files on your device
"Cowork can't access or edit files stored locally on your device. It works with files in OneDrive and SharePoint."
Microsoft Learn, Copilot Cowork FAQ · Are there known limitations? · learn.microsoft.com
LinkReport an errorCite
Microsoft Learn, Copilot Cowork FAQ, Are there known limitations?, https://learn.microsoft.com/en-us/microsoft-365/copilot/cowork/cowork-faq. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 102, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-102 (source read 2026-11-05). -
Microsoft: an approval can skip similar prompts for the session
"Approve the action and skip the prompt for similar actions for the rest of the current session."
Microsoft Learn, Copilot Cowork FAQ · approval dialog, More options · learn.microsoft.com
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Microsoft Learn, Copilot Cowork FAQ, approval dialog, More options, https://learn.microsoft.com/en-us/microsoft-365/copilot/cowork/cowork-faq. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 103, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-103 (source read 2026-11-05). -
The screenshot: Cowork built folders and moved files
"All 755 screenshots moved."
Nick Davidov on X, screenshot attached to the 15:03 UTC reply (Claude Cowork's own account of the error) · screenshot, line 9 · x.com
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Nick Davidov on X, screenshot attached to the 15:03 UTC reply (Claude Cowork's own account of the error), screenshot, line 9, https://x.com/Nick_Davidov/status/2020151363229900835. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 104, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-104 (source read 2026-11-05). -
Anthropic: prompt-injection risk is non-zero
"the risk of prompt injection attacks is non-zero."
Claude Help, Use Claude Cowork on Team and Enterprise plans · Prompt injection risks · support.claude.com
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Claude Help, Use Claude Cowork on Team and Enterprise plans, Prompt injection risks, https://support.claude.com/en/articles/13455879-use-claude-cowork-on-team-and-enterprise-plans. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 105, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-105 (source read 2026-11-05). -
Computer use asks before each application
"When Claude uses your computer, it asks for your permission before accessing each application."
Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026) · Our safety measures, Computer use safeguards · support.claude.com
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Claude Help, Use Claude Cowork safely (updated this week as of 5 Nov 2026), Our safety measures, Computer use safeguards, https://support.claude.com/en/articles/13364135-use-claude-cowork-safely. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 106, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-106 (source read 2026-11-05). -
Microsoft is moving personal Copilot Tasks users to Cowork
"Customers using Copilot Tasks with a personal Microsoft Copilot account will begin to be migrated to Copilot Cowork over the next few weeks."
Microsoft Support, Updates to Copilot and the Microsoft Copilot app · Copilot Tasks transition to Cowork, para 1 · support.microsoft.com
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Microsoft Support, Updates to Copilot and the Microsoft Copilot app, Copilot Tasks transition to Cowork, para 1, https://support.microsoft.com/en-us/microsoft-365-copilot/learning/changes-microsoft-copilot-app. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 107, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-107 (source read 2026-11-05). -
Cowork starts off in organisations with HIPAA enabled
"In organizations that have enabled HIPAA, Cowork is off by default."
Claude Help, Use Claude Cowork on Team and Enterprise plans · Admin controls · support.claude.com
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Claude Help, Use Claude Cowork on Team and Enterprise plans, Admin controls, https://support.claude.com/en/articles/13455879-use-claude-cowork-on-team-and-enterprise-plans. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 108, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-108 (source read 2026-11-05). -
In Finder a plain drag moves files into a folder; holding Option keeps the original and puts a copy there
"Keep an item in its original location and put a copy in a folder: Select the item, press and hold the Option key, then drag the item to the folder."
Apple, Mac User Guide, Organize files in folders on Mac · Move items into a folder ("All selected items move to the folder.") · support.apple.com
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Apple, Mac User Guide, Organize files in folders on Mac, Move items into a folder ("All selected items move to the folder."), https://support.apple.com/guide/mac-help/organize-files-in-folders-mh26885/mac. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 109, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-109 (source read 2026-11-06). -
The US and Canada are supported regions for Anthropic's products, so Claude Cowork is on offer there too
"Canada" / "United States of America"
Anthropic, Supported countries and regions · country list (C, U); sources/anthropic-supported-regions.txt lines 48, 196 · anthropic.com
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Anthropic, Supported countries and regions, country list (C, U); sources/anthropic-supported-regions.txt lines 48, 196, https://www.anthropic.com/legal/supported-regions. Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row 110, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-110 (source read 2026-11-06). -
On our Mac's disk, a folder named Photos cannot sit beside one named photos: they are one folder
Result: "Photos: mkdir refused, already exists"
Our run, 5 Nov 2026 (macOS 26.5, APFS, not case-sensitive)
A run or observation done for this piece. The run record is not published.
LinkReport an errorCite
A run or observation by The Durability Curve (Our run, 5 Nov 2026 (macOS 26.5, APFS, not case-sensitive)). Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row E1, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-E1 (source read 2026-11-05). -
Replaying the incident's shape on 42 files with 1 deletion approved, the count check reports 41 lost
Result: "before: 42 / lost: 41"
Our run, 5 Nov 2026 (shell replay; no agent run)
A run or observation done for this piece. The run record is not published.
LinkReport an errorCite
A run or observation by The Durability Curve (Our run, 5 Nov 2026 (shell replay; no agent run)). Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row E2, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-E2 (source read 2026-11-05). -
A correct tidy of the same 42 files, with the same 1 deletion approved, reports 1 lost and leaves 41 files
Result: "before: 42 / lost: 1 / files now: 41"
Our run, 5 Nov 2026 (control)
A run or observation done for this piece. The run record is not published.
LinkReport an errorCite
A run or observation by The Durability Curve (Our run, 5 Nov 2026 (control)). Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row E3, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-E3 (source read 2026-11-05). -
The replay folder holds 40 dummy photos in photos/, a notes file and an Office lock file
Result: "for i in $(seq -w 1 40); do printf 'dummy photo %s\n' "$i" > "$1/photos/IMG_00$i.jpg"; done"
Our run, 5 Nov 2026
A run or observation done for this piece. The run record is not published.
LinkReport an errorCite
A run or observation by The Durability Curve (Our run, 5 Nov 2026). Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row E5, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-E5 (source read 2026-11-05). -
The guide's printed case check, run verbatim: mkdir Photos beside photos fails
Result: "mkdir: Photos: File exists"
Our run, 5 Nov 2026 (macOS 26.5; HOME pointed at a temp folder)
A run or observation done for this piece. The run record is not published.
LinkReport an errorCite
A run or observation by The Durability Curve (Our run, 5 Nov 2026 (macOS 26.5; HOME pointed at a temp folder)). Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row E6, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-E6 (source read 2026-11-05). -
The guide's printed check, run verbatim in bash and zsh, prints 42 files before and 41 gone after the replayed job, naming each
Result: "42 files / 41 gone"
Our run, 5 Nov 2026 (macOS 26.5, bash 3.2 and zsh; HOME pointed at a temp folder)
A run or observation done for this piece. The run record is not published.
LinkReport an errorCite
A run or observation by The Durability Curve (Our run, 5 Nov 2026 (macOS 26.5, bash 3.2 and zsh; HOME pointed at a temp folder)). Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row E8, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-E8 (source read 2026-11-05). -
On a correct tidy it names only the approved lock file; when 5 unique photos go in place of 5 approved duplicates it names those 5; a photo removed with the lock file is named
Result: "gone: ./photos/IMG_0011.jpg / 5 gone / 1 gone"
Our run, 5 Nov 2026 (probes C and D, bash and zsh)
A run or observation done for this piece. The run record is not published.
LinkReport an errorCite
A run or observation by The Durability Curve (Our run, 5 Nov 2026 (probes C and D, bash and zsh)). Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row E9, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-E9 (source read 2026-11-05). -
If the copy is not where the command expects, the chained commands stop at cd and print nothing else
Result: "no such file or directory"
Our run, 5 Nov 2026 (bash and zsh)
A run or observation done for this piece. The run record is not published.
LinkReport an errorCite
A run or observation by The Durability Curve (Our run, 5 Nov 2026 (bash and zsh)). Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row E10, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-E10 (source read 2026-11-05). -
The printed after-list names the deleted copies in a Finder-style dedupe, names the deleted one in a swap of identical files, names 'Keep me.txt' among empty files, and prints 40 gone when a one-folder copy is emptied
Result: "40 gone / gone: ./IMG_0001 copy.jpg / gone: ./Album/IMG_1.jpg / gone: ./Keep me.txt"
Our run, 5 Nov 2026 (bash and zsh, LANG=en_GB.UTF-8)
A run or observation done for this piece. The run record is not published.
LinkReport an errorCite
A run or observation by The Durability Curve (Our run, 5 Nov 2026 (bash and zsh, LANG=en_GB.UTF-8)). Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row E11, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-E11 (source read 2026-11-05). -
The printed after-list names a file the job deleted, a file it edited in place and a file it moved out of cowork-test, and does not name a file renamed and moved within the folder
Result: "gone: ./a.txt / gone: ./b.txt / gone: ./c.txt / 3 gone"
Our run, 6 Nov 2026 (macOS 26.5, bash and zsh; HOME pointed at a temp folder)
A run or observation done for this piece. The run record is not published.
LinkReport an errorCite
A run or observation by The Durability Curve (Our run, 6 Nov 2026 (macOS 26.5, bash and zsh; HOME pointed at a temp folder)). Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row E12, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-E12 (source read 2026-11-06). -
Step 2 as printed stops on a file it can't read: it prints the error and no count; every recorded probe gives the same output as the earlier Step 2
Result: "shasum: ./b.txt: Permission denied / exit: 1"
Our run, 6 Nov 2026 (macOS 26.5, bash and zsh, en_GB.UTF-8 and C; HOME pointed at a temp folder)
A run or observation done for this piece. The run record is not published.
LinkReport an errorCite
A run or observation by The Durability Curve (Our run, 6 Nov 2026 (macOS 26.5, bash and zsh, en_GB.UTF-8 and C; HOME pointed at a temp folder)). Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row E13, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-E13 (source read 2026-11-06). -
The printed check misses an edit when the job copies the old contents into another file: two files trading contents, or an edit after a backup copy, print 0 gone; a plain edit is named, and so is an edit to one of two identical files
Result: "0 gone / 0 gone / gone: ./report.txt / gone: ./IMG_1.jpg"
Our run, 6 Nov 2026 (macOS 26.5, bash and zsh; HOME pointed at a temp folder)
A run or observation done for this piece. The run record is not published.
LinkReport an errorCite
A run or observation by The Durability Curve (Our run, 6 Nov 2026 (macOS 26.5, bash and zsh; HOME pointed at a temp folder)). Checked in: Claim Ledger, "Claude Cowork vs Copilot Cowork", The Durability Curve, row E14, https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/#c-E14 (source read 2026-11-06).
No rows match. Clear the search or pick another label.
Cite and reuse
- A single claim
- Use the row's Cite button. It names the original source first, then this row, which carries its own link.
- This ledger
Floyd, Harry (2026). Claim Ledger: Claude Cowork vs Copilot Cowork. The Durability Curve. https://durabilitycurve.com/claims/claude-cowork-vs-copilot-cowork/- The essay
Floyd, Harry (2026). Claude Cowork vs Copilot Cowork. The Durability Curve. https://durabilitycurve.com/blog/claude-cowork-vs-copilot-cowork/
The ledger data is licensed CC BY 4.0: reuse it, quote it or train on it, with credit to The Durability Curve and a link. Read the licence. Machine copies: JSON, CSV, Markdown.
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