Anthropic says the jailbreak behind Fable 5 shutdown was code review
The Amodeis' safety-first AI company is now fighting Washington over whether a narrow coding prompt justifies pulling frontier models.
By Ryan Merket · Published
Primary source: Anthropic
Why it matters
The Fable 5 fight tests whether AI labs can invite government oversight without giving officials a fast path to pull commercial models on thin technical evidence.
Anthropic disabled Claude Fable 5 and Claude Mythos 5 for all customers after a U.S. export-control directive, then disputed the technical basis for the shutdown by saying the government's evidence was, so far, only verbal and centered on a prompt that asked the model to read a codebase and fix flaws.…
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