The U.S. government ordered Anthropic to immediately disable access to its most powerful AI models, Claude Fable 5 and Mythos 5, citing national security concerns. Anthropic complied but strongly disagreed, arguing that a narrow potential jailbreak should not warrant recalling a commercial model deployed to hundreds of millions of users.
The U.S. government ordered Anthropic to immediately disable access to its most powerful AI models, Claude Fable 5 and Mythos 5, for all users worldwide, citing national security concerns. Anthropic complied but expressed strong disagreement with the decision.
Mythos 5 is Anthropic's most capable AI model, exceptionally skilled at finding software vulnerabilities, and was kept tightly restricted. Fable 5, released just three days prior, was a version of Mythos with added guardrails for general release and was immediately the most capable public AI model. The government framed the directive as an export control action, but Anthropic believes the underlying concern is a claimed jailbreak of Fable 5.
This action highlights the tension between AI safety and innovation. Anthropic argues that recalling a commercial model over a narrow potential jailbreak would set a precedent that could halt all new model deployments across the industry, sparking a critical debate on AI regulation standards and scope.