US government orders Anthropic to disable Fable 5 and Mythos 5 AI models worldwide over security concerns
By
Matthias Bastian
Hand-rolled, kettle-boiled, baked to perfection. Worth every minute at the bakery.
Summary
The US government has ordered Anthropic to disable global access to its most powerful AI models, Fable 5 and Mythos 5, citing national security concerns over alleged jailbreak vulnerabilities. Anthropic is complying with the export control directive but publicly pushing back, arguing the vulnerabilities are minor and exist in competing models like GPT-5.5. The company warns this could set a precedent halting all frontier AI deployments. Ironically, Anthropic had previously spent months hyping cybersecurity risks of its own Mythos class models.
Key quotes
· 3 pulledAnthropic calls the move a 'misunderstanding'
the vulnerabilities are minor and exist in competing models like GPT-5.5
Anthropic warns the move could set a precedent that halts all frontier deployments
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