--- title: "Claim Ledger: One Question for Any AI Model Headline: Can You Use It?" description: "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." author: "Harry Floyd" publication: "The Durability Curve" canonical: "https://durabilitycurve.com/claims/released-to-whom/" essay: "https://durabilitycurve.com/blog/released-to-whom/" published: "2026-09-25" ledger_date: "2026-09-25" law: "Law IV" claims: 21 removed_before_publication: 0 --- # 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.* Essay: https://durabilitycurve.com/blog/released-to-whom/ Ledger (canonical, cite this): https://durabilitycurve.com/claims/released-to-whom/ Published 2026-09-25 · last verified 2026-09-25 ## The evidence, row by row Labels: 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 (secondary, not openable in full, or supported only in part); the essay words it accordingly · STRUCK = drafted, checked and removed before publication · EXCLUDED = considered and deliberately left out. ### R1. At launch Anthropic restricted Mythos 5 to Glasswing partners, with select biology researchers to follow - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R1 - Quote: "Claude Mythos 5 is restricted to Glasswing partners (with cyber safeguards lifted) and soon to select biology researchers" - Source: Anthropic, Claude Fable 5 and Claude Mythos 5 (9 Jun 2026), page-text offset 83.3% - URL: https://www.anthropic.com/news/claude-fable-5-mythos-5 ### R2. Mythos 5 is the same underlying model as Fable 5 with safeguards lifted in some areas - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R2 - Quote: "It's the same underlying model as Fable 5, but with the safeguards lifted in some areas." - Source: Anthropic (9 Jun 2026), page-text offset 6.5% - URL: https://www.anthropic.com/news/claude-fable-5-mythos-5 ### R3. Anthropic says Mythos 5 has the strongest cybersecurity capabilities of any model - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R3 - Quote: "It has the strongest cybersecurity capabilities of any model in the world." - Source: Anthropic (9 Jun 2026), page-text offset 7.4% - URL: https://www.anthropic.com/news/claude-fable-5-mythos-5 ### R4. 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 - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R4 - Quote: "Availability Claude Fable 5 is available everywhere today." - Source: Anthropic (9 Jun 2026), page-text offset 83.1% - URL: https://www.anthropic.com/news/claude-fable-5-mythos-5 ### R5. 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) - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R5 - Quote: "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." - Source: Claude Help Center, Claude Fable models on your plan (read 2026-09-25), page-text offset 74.3% - URL: https://support.claude.com/en/articles/15424964-claude-fable-models-on-your-plan ### R6. On Max, Fable use is capped at up to 50% of weekly usage limits at no extra cost - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R6 - Quote: "You can use up to 50% of your weekly usage limits on Fable models at no extra cost." - Source: Claude Help Center (read 2026-09-25), page-text offset 77.4% - URL: https://support.claude.com/en/articles/15424964-claude-fable-models-on-your-plan ### R7. OpenAI: GPT-6 Astra becomes available to ChatGPT Plus, Pro, Business and Enterprise users (Free not listed) - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R7 - Quote: "will become available to all ChatGPT Plus, Pro, Business, and Enterprise users" - Source: 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 - URL: https://openai.com/index/gpt-6-astra/ ### R8. OpenAI: the released Astra refuses more advanced cybersecurity tasks such as proof-of-concept exploits - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R8 - Quote: "Astra will refuse to comply with more advanced cybersecurity tasks such as creating proof-of-concept exploits for vulnerabilities." - Source: 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 - URL: https://openai.com/index/gpt-6-astra/ ### R8b. OpenAI plans to expand access with less restrictive safeguards through Daybreak - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R8b - Quote: "Through OpenAI Daybreak⁠, we plan to expand access and roll out less restrictive safeguards in the coming weeks." - Source: 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 - URL: https://openai.com/index/gpt-6-astra/ ### R8c. OpenAI gives GPT-6 Astra Pro to Pro, Business and Enterprise users (Plus not listed) - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R8c - Quote: "Users on the Pro, Business, and Enterprise plans will also get access to GPT‑6 Astra Pro." - Source: 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 - URL: https://openai.com/index/gpt-6-astra/ ### R9. Google: Gemini 3.8 Flash reaches consumers only on Google AI Pro and Ultra - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R9 - Quote: "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." - Source: Google, Introducing Gemini 3.8 Flash and 3.8 Flash Cyber (2 Sep 2026), page-text offset 85.8% - URL: https://blog.google/innovation-and-ai/models-and-research/gemini-models/3-8-flash-and-3-8-flash-cyber/ ### R10. Google makes Gemini 3.8 Flash Cyber available to trusted defenders through its Fairwind Program - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R10 - Quote: "available to trusted defenders through our new Fairwind Program" - Source: Google (2 Sep 2026), page-text offset 34.5% - URL: https://blog.google/innovation-and-ai/models-and-research/gemini-models/3-8-flash-and-3-8-flash-cyber/ ### R11. xAI: Grok 4.7 is available in Cursor, Grok Build and the Grok API (the Grok app is not listed) - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R11 - Quote: "Grok 4.7 is available today in Cursor and Grok Build. It is also available through the Grok API" - Source: xAI, Introducing Grok 4.7 (21 Sep 2026), page-text offset 77.3% - URL: https://x.ai/news/grok-4-7 ### R13. Solaiman (2023) set out six levels of access to generative AI systems, from fully closed to fully open - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R13 - Quote: "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" - Source: Irene Solaiman, The Gradient of Generative AI Release (arXiv:2302.04844, Feb 2023), page-text offset 15.3% - URL: https://arxiv.org/abs/2302.04844 ### R14. 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 - Status: EXECUTED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R14 - Quote: "GPT-6 Astra Extra High" - Source: First-party observation, the author's own account ### R15. 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 - Status: EXECUTED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R15 - Quote: "3.6 Flash" - Source: First-party observation, the author's own account ### R16. 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 - Status: EXECUTED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R16 - Quote: "Build apps and sites · Grok 4.6" - Source: First-party observation, the author's own account ### R17. 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 - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R17 - Quote: "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" - Source: 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 - URL: https://www.anthropic.com/claude-fable-and-mythos-5-1 ### R17b. Anthropic: Mythos 5.1 (cyber safeguards off) has the strongest cyber capabilities of any model Anthropic has released - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R17b - Quote: "the strongest cyber capabilities of any model we’ve released" - Source: Anthropic (1 Sep 2026), page-text offset 63.0% · page rendered in a browser; availability paragraph saved verbatim - URL: https://www.anthropic.com/claude-fable-and-mythos-5-1 ### R18. 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 - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R18 - Quote: "Plus plans include GPT‑6 Astra in ChatGPT Work and Codex." - Source: 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 - URL: https://help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgpt ### R18b. OpenAI Help: GPT-6 Pro, powered by GPT-6 Astra, is for Pro, Business and Enterprise plans - Status: VERIFIED (read 2026-09-25) - Row link: https://durabilitycurve.com/claims/released-to-whom/#c-R18b - Quote: "GPT‑6 Pro, powered by GPT‑6 Astra, is available in ChatGPT for Pro $100, Pro $200, Business and Enterprise plans" - Source: OpenAI Help Center (rendered in a browser), page-text offset 49.2% · page rendered in a browser; availability paragraph saved verbatim - URL: https://help.openai.com/en/articles/20001354-gpt-56-and-gpt-6-pro-in-chatgpt ## Cite - A claim: name the original source (and its locator) first, then the row it was checked in, e.g. ", . Checked in: Claim Ledger, "One Question for Any AI Model Headline: Can You Use It?", The Durability Curve, row , https://durabilitycurve.com/claims/released-to-whom/#c-." - 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/ - 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/ - Downloads: https://durabilitycurve.com/claims/released-to-whom.csv · https://durabilitycurve.com/claims/released-to-whom.json Licence: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Reuse it, quote it or train on it, with credit to The Durability Curve and a link. Open to AI (robots.txt: search=yes, ai-input=yes, ai-train=yes).