Claim ledger

One Question for Any AI Model Headline: Can You Use It?

It may be in a mode you didn't open, on a plan you don't have, or kept for partners. Here's the check.

Read the essay Published Tests Law IV: Instruments Over Theory

Claims
21
Verified at the primary source
18
Removed before publication
0
Last checked

21 claims: 18 verified, 3 executed.

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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 (7)
  1. Anthropic 6 rows
  2. Claude Help Center 2 rows
  3. OpenAI 6 rows
  4. Google 2 rows
  5. xAI 1 row
  6. Irene Solaiman 1 row
  7. First-party runs 3 rows
  1. R1 Verified Read

    At launch Anthropic restricted Mythos 5 to Glasswing partners, with select biology researchers to follow

    "Claude Mythos 5 is restricted to Glasswing partners (with cyber safeguards lifted) and soon to select biology researchers"

    Anthropic, Claude Fable 5 and Claude Mythos 5 (9 Jun 2026) · page-text offset 83.3% · anthropic.com

    Link
    Cite

    Anthropic, Claude Fable 5 and Claude Mythos 5 (9 Jun 2026), page-text offset 83.3%, https://www.anthropic.com/news/claude-fable-5-mythos-5. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R1, https://durabilitycurve.com/claims/released-to-whom/#c-R1 (source read 2026-09-25).

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  2. R2 Verified Read

    Mythos 5 is the same underlying model as Fable 5 with safeguards lifted in some areas

    "It's the same underlying model as Fable 5, but with the safeguards lifted in some areas."

    Anthropic (9 Jun 2026) · page-text offset 6.5% · anthropic.com

    Link
    Cite

    Anthropic (9 Jun 2026), page-text offset 6.5%, https://www.anthropic.com/news/claude-fable-5-mythos-5. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R2, https://durabilitycurve.com/claims/released-to-whom/#c-R2 (source read 2026-09-25).

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  3. R3 Verified Read

    Anthropic says Mythos 5 has the strongest cybersecurity capabilities of any model

    "It has the strongest cybersecurity capabilities of any model in the world."

    Anthropic (9 Jun 2026) · page-text offset 7.4% · anthropic.com

    Link
    Cite

    Anthropic (9 Jun 2026), page-text offset 7.4%, https://www.anthropic.com/news/claude-fable-5-mythos-5. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R3, https://durabilitycurve.com/claims/released-to-whom/#c-R3 (source read 2026-09-25).

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  4. R4 Verified Read

    Anthropic's announcement has an Availability section naming who gets each model (Fable 5 everywhere; Mythos 5 restricted); its subscription-plan terms were staged and later changed, so the help page (R5) carries the current terms

    "Availability Claude Fable 5 is available everywhere today."

    Anthropic (9 Jun 2026) · page-text offset 83.1% · anthropic.com

    Link
    Cite

    Anthropic (9 Jun 2026), page-text offset 83.1%, https://www.anthropic.com/news/claude-fable-5-mythos-5. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R4, https://durabilitycurve.com/claims/released-to-whom/#c-R4 (source read 2026-09-25).

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  5. R5 Verified Read

    On Claude Max, Fable 5 and 5.1 are a standard part of the plan; on Pro they run on pay-as-you-go usage credits (current terms; the separate Fable 5 50% PROMOTION ended 19 Jul 2026 and is not what the article cites)

    "On Max plans, premium seats on Team plans, and premium seats on legacy seat-based Enterprise plans, both are a standard part of your plan. On Pro plans, standard seats on Team plans, and standard seats on legacy seat-based Enterprise plans, both models run on pay-as-you-go usage credits."

    Claude Help Center, Claude Fable models on your plan (read 2026-09-25) · page-text offset 74.3% · support.claude.com

    Link
    Cite

    Claude Help Center, Claude Fable models on your plan (read 2026-09-25), page-text offset 74.3%, https://support.claude.com/en/articles/15424964-claude-fable-models-on-your-plan. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R5, https://durabilitycurve.com/claims/released-to-whom/#c-R5 (source read 2026-09-25).

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  6. R6 Verified Read

    On Max, Fable use is capped at up to 50% of weekly usage limits at no extra cost

    "You can use up to 50% of your weekly usage limits on Fable models at no extra cost."

    Claude Help Center (read 2026-09-25) · page-text offset 77.4% · support.claude.com

    Link
    Cite

    Claude Help Center (read 2026-09-25), page-text offset 77.4%, https://support.claude.com/en/articles/15424964-claude-fable-models-on-your-plan. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R6, https://durabilitycurve.com/claims/released-to-whom/#c-R6 (source read 2026-09-25).

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  7. R7 Verified Read

    OpenAI: GPT-6 Astra becomes available to ChatGPT Plus, Pro, Business and Enterprise users (Free not listed)

    "will become available to all ChatGPT Plus, Pro, Business, and Enterprise users"

    OpenAI, GPT-6 Astra (Sept 2026; page undated, carries an "Update on September 22, 2026"; page rendered in a browser) · page-text offset 11.1% · page rendered in a browser; availability paragraph saved verbatim · openai.com

    Link
    Cite

    OpenAI, GPT-6 Astra (Sept 2026; page undated, carries an "Update on September 22, 2026"; page rendered in a browser), page-text offset 11.1% · page rendered in a browser; availability paragraph saved verbatim, https://openai.com/index/gpt-6-astra/. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R7, https://durabilitycurve.com/claims/released-to-whom/#c-R7 (source read 2026-09-25).

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  8. R8 Verified Read

    OpenAI: the released Astra refuses more advanced cybersecurity tasks such as proof-of-concept exploits

    "Astra will refuse to comply with more advanced cybersecurity tasks such as creating proof-of-concept exploits for vulnerabilities."

    OpenAI, GPT-6 Astra (Sept 2026; page undated, carries an "Update on September 22, 2026") · page-text offset 70.8% · page rendered in a browser; availability paragraph saved verbatim · openai.com

    Link
    Cite

    OpenAI, GPT-6 Astra (Sept 2026; page undated, carries an "Update on September 22, 2026"), page-text offset 70.8% · page rendered in a browser; availability paragraph saved verbatim, https://openai.com/index/gpt-6-astra/. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R8, https://durabilitycurve.com/claims/released-to-whom/#c-R8 (source read 2026-09-25).

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  9. R8b Verified Read

    OpenAI plans to expand access with less restrictive safeguards through Daybreak

    "Through OpenAI Daybreak⁠, we plan to expand access and roll out less restrictive safeguards in the coming weeks."

    OpenAI, GPT-6 Astra (Sept 2026; page undated, carries an "Update on September 22, 2026") · page-text offset 86.5% · page rendered in a browser; availability paragraph saved verbatim · openai.com

    Link
    Cite

    OpenAI, GPT-6 Astra (Sept 2026; page undated, carries an "Update on September 22, 2026"), page-text offset 86.5% · page rendered in a browser; availability paragraph saved verbatim, https://openai.com/index/gpt-6-astra/. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R8b, https://durabilitycurve.com/claims/released-to-whom/#c-R8b (source read 2026-09-25).

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  10. R8c Verified Read

    OpenAI gives GPT-6 Astra Pro to Pro, Business and Enterprise users (Plus not listed)

    "Users on the Pro, Business, and Enterprise plans will also get access to GPT‑6 Astra Pro."

    OpenAI, GPT-6 Astra (Sept 2026; page undated, carries an "Update on September 22, 2026") · page-text offset 46.9% · page rendered in a browser; availability paragraph saved verbatim · openai.com

    Link
    Cite

    OpenAI, GPT-6 Astra (Sept 2026; page undated, carries an "Update on September 22, 2026"), page-text offset 46.9% · page rendered in a browser; availability paragraph saved verbatim, https://openai.com/index/gpt-6-astra/. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R8c, https://durabilitycurve.com/claims/released-to-whom/#c-R8c (source read 2026-09-25).

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  11. R9 Verified Read

    Google: Gemini 3.8 Flash reaches consumers only on Google AI Pro and Ultra

    "Consumers: 3.8 Flash is available to Google AI Pro and Ultra subscribers across the Gemini app, AI Mode in Google Search and Gemini in Google Sheets."

    Google, Introducing Gemini 3.8 Flash and 3.8 Flash Cyber (2 Sep 2026) · page-text offset 85.8% · blog.google

    Link
    Cite

    Google, Introducing Gemini 3.8 Flash and 3.8 Flash Cyber (2 Sep 2026), page-text offset 85.8%, https://blog.google/innovation-and-ai/models-and-research/gemini-models/3-8-flash-and-3-8-flash-cyber/. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R9, https://durabilitycurve.com/claims/released-to-whom/#c-R9 (source read 2026-09-25).

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  12. R10 Verified Read

    Google makes Gemini 3.8 Flash Cyber available to trusted defenders through its Fairwind Program

    "available to trusted defenders through our new Fairwind Program"

    Google (2 Sep 2026) · page-text offset 34.5% · blog.google

    Link
    Cite

    Google (2 Sep 2026), page-text offset 34.5%, https://blog.google/innovation-and-ai/models-and-research/gemini-models/3-8-flash-and-3-8-flash-cyber/. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R10, https://durabilitycurve.com/claims/released-to-whom/#c-R10 (source read 2026-09-25).

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  13. R11 Verified Read

    xAI: Grok 4.7 is available in Cursor, Grok Build and the Grok API (the Grok app is not listed)

    "Grok 4.7 is available today in Cursor and Grok Build. It is also available through the Grok API"

    xAI, Introducing Grok 4.7 (21 Sep 2026) · page-text offset 77.3% · x.ai

    Link
    Cite

    xAI, Introducing Grok 4.7 (21 Sep 2026), page-text offset 77.3%, https://x.ai/news/grok-4-7. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R11, https://durabilitycurve.com/claims/released-to-whom/#c-R11 (source read 2026-09-25).

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  14. R13 Verified Read

    Solaiman (2023) set out six levels of access to generative AI systems, from fully closed to fully open

    "six levels of access to generative AI systems: fully closed; gradual or staged access; hosted access; cloud-based or API access; downloadable access; and fully open"

    Irene Solaiman, The Gradient of Generative AI Release (arXiv:2302.04844, Feb 2023) · page-text offset 15.3% · arxiv.org

    Link
    Cite

    Irene Solaiman, The Gradient of Generative AI Release (arXiv:2302.04844, Feb 2023), page-text offset 15.3%, https://arxiv.org/abs/2302.04844. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R13, https://durabilitycurve.com/claims/released-to-whom/#c-R13 (source read 2026-09-25).

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  15. R14 Executed Read

    On one ChatGPT Plus account (checked 2026-09-25), Chat mode listed GPT-5.6 Sol and GPT-5.5; Work mode showed GPT-6 Astra

    Result: "GPT-6 Astra Extra High"

    First-party observation, the author's own account

    A run or observation done for this piece. The run record is not published.

    Link
    Cite

    A run or observation by The Durability Curve (First-party observation, the author's own account). Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R14, https://durabilitycurve.com/claims/released-to-whom/#c-R14 (source read 2026-09-25).

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  16. R15 Executed Read

    On a Gemini 'Plus' account (checked 2026-09-25), the picker listed 3.5 Flash-Lite, 3.6 Flash, 3.1 Pro and Extended thinking: no 3.8 Flash

    Result: "3.6 Flash"

    First-party observation, the author's own account

    A run or observation done for this piece. The run record is not published.

    Link
    Cite

    A run or observation by The Durability Curve (First-party observation, the author's own account). Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R15, https://durabilitycurve.com/claims/released-to-whom/#c-R15 (source read 2026-09-25).

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  17. R16 Executed Read

    Grok's picker (checked 2026-09-25) shows modes (Auto, Fast, Expert, Build, Heavy); hovering shows each mode's model, and every model-naming mode says Grok 4.6

    Result: "Build apps and sites · Grok 4.6"

    First-party observation, the author's own account

    A run or observation done for this piece. The run record is not published.

    Link
    Cite

    A run or observation by The Durability Curve (First-party observation, the author's own account). Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R16, https://durabilitycurve.com/claims/released-to-whom/#c-R16 (source read 2026-09-25).

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  18. R17 Verified Read

    Anthropic: Fable 5.1 and Mythos 5.1 are the same model with different safeguards; Fable 5.1 is generally available, Mythos 5.1 only through trusted access programs

    "Claude Fable 5.1 and Claude Mythos 5.1 are the same model, but with different levels of safeguards. Fable 5.1 is generally available, while Mythos 5.1 is available only through our trusted access programs"

    Anthropic, Introducing Claude Fable 5.1 and Claude Mythos 5.1 (1 Sep 2026) · page-text offset 4.0% · page rendered in a browser; availability paragraph saved verbatim · anthropic.com

    Link
    Cite

    Anthropic, Introducing Claude Fable 5.1 and Claude Mythos 5.1 (1 Sep 2026), page-text offset 4.0% · page rendered in a browser; availability paragraph saved verbatim, https://www.anthropic.com/claude-fable-and-mythos-5-1. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R17, https://durabilitycurve.com/claims/released-to-whom/#c-R17 (source read 2026-09-25).

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  19. R17b Verified Read

    Anthropic: Mythos 5.1 (cyber safeguards off) has the strongest cyber capabilities of any model Anthropic has released

    "the strongest cyber capabilities of any model we’ve released"

    Anthropic (1 Sep 2026) · page-text offset 63.0% · page rendered in a browser; availability paragraph saved verbatim · anthropic.com

    Link
    Cite

    Anthropic (1 Sep 2026), page-text offset 63.0% · page rendered in a browser; availability paragraph saved verbatim, https://www.anthropic.com/claude-fable-and-mythos-5-1. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R17b, https://durabilitycurve.com/claims/released-to-whom/#c-R17b (source read 2026-09-25).

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  20. R18 Verified Read

    OpenAI Help: Plus plans include GPT-6 Astra in ChatGPT Work and Codex; GPT-6 Pro (powered by Astra) is for Pro, Business and Enterprise

    "Plus plans include GPT‑6 Astra in ChatGPT Work and Codex."

    OpenAI Help Center, GPT-5.6 and GPT-6 Pro in ChatGPT (updated ~16 Sep 2026; rendered in a browser) · page-text offset 72.7% · page rendered in a browser; availability paragraph saved verbatim · help.openai.com

    Link
    Cite

    OpenAI Help Center, GPT-5.6 and GPT-6 Pro in ChatGPT (updated ~16 Sep 2026; rendered in a browser), page-text offset 72.7% · page rendered in a browser; availability paragraph saved verbatim, https://help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgpt. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R18, https://durabilitycurve.com/claims/released-to-whom/#c-R18 (source read 2026-09-25).

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  21. R18b Verified Read

    OpenAI Help: GPT-6 Pro, powered by GPT-6 Astra, is for Pro, Business and Enterprise plans

    "GPT‑6 Pro, powered by GPT‑6 Astra, is available in ChatGPT for Pro $100, Pro $200, Business and Enterprise plans"

    OpenAI Help Center (rendered in a browser) · page-text offset 49.2% · page rendered in a browser; availability paragraph saved verbatim · help.openai.com

    Link
    Cite

    OpenAI Help Center (rendered in a browser), page-text offset 49.2% · page rendered in a browser; availability paragraph saved verbatim, https://help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgpt. Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row R18b, https://durabilitycurve.com/claims/released-to-whom/#c-R18b (source read 2026-09-25).

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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: One Question for Any AI Model Headline: Can You Use It? The Durability Curve. https://durabilitycurve.com/claims/released-to-whom/
The essay
Floyd, Harry (2026). One Question for Any AI Model Headline: Can You Use It? The Durability Curve. https://durabilitycurve.com/blog/released-to-whom/

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.