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Anthropic disables Fable 5 and Mythos 5 after US Commerce order
Confirmed
What we know
Anthropic disabled customer access to Claude Fable 5 and Mythos 5 after the U.S. Commerce Department ordered the company to suspend all access by any foreign national, inside or outside the United States, including Anthropic’s own non-U.S. employees. The company said the only way to ensure compliance was to take both models offline for all customers; other Anthropic models remained available.
Anthropic said it received the directive Friday evening and understood the government believed a method of jailbreaking Fable 5 had been demonstrated. The company disputed that a narrow jailbreak should force a public model offline for hundreds of millions of users and said it was working with authorities to restore access.
What's confirmed
- Commerce export-control directive: suspend Fable 5 and Mythos 5 for all foreign nationals worldwide, including Anthropic foreign-national staff (BBC/CNN/Anthropic).
- Anthropic: disabled both models globally for all customers to comply; other models unaffected (BBC/CNN).
- Anthropic: government appears concerned about a Fable 5 jailbreak; firm says vulnerabilities were minor and reproducible on other public models (BBC/CNN).
- EU Commission took note and said it was assessing; episode follows separate Pentagon “supply chain risk” fight with Anthropic (BBC).
What's still developing
- Whether Commerce retracts or narrows the order after technical talks and new safeguards.
- Timeline for restoring Fable 5 / Mythos 5 to U.S. and foreign users.
- Whether rival frontier models face similar nationality-based export controls.
Sources
- BBC News — Anthropic suspends new AI tools over US government security concerns link
- CNN — Anthropic suspends all access to Mythos model after US government bans foreign nationals use link
- Al Jazeera — US asks Anthropic to block global access to top AI models: Why it matters link
- Euronews — Why Anthropic is halting access to its Fable 5 and Mythos 5 AI models link