Anthropic suspends latest AI models after US blocks access to foreigners
Anthropic suspended its latest AI models, Mythos 5 and Fable 5, after the US government ordered access restrictions for foreign nationals due to a jailbreak vulnerability, citing national security risks. The company criticized the move, arguing it was based on a misunderstanding and could disrupt broader AI deployments if applied industry-wide.
Anthropic has suspended its most advanced AI models, Mythos 5 and Fable 5, following a US government directive to limit access for all foreign users. The order came after Commerce Secretary Howard Lutnick identified a jailbreak vulnerability in the models, raising national security concerns. The Trump administration had previously allowed federal agencies to test Mythos but had not blocked its deployment to customers. The suspension applies globally, including within the US, despite the Trump administration’s recent executive order establishing a voluntary framework for reviewing frontier AI models. Anthropic stated the decision was based on a misunderstanding and argued that recalling models over a narrow jailbreak risk could halt all future AI deployments. The company is currently suing the US government over its designation as a supply-chain risk by the Pentagon, stemming from disputes over AI use in warfare. President Donald Trump has previously criticized Anthropic, calling its leadership 'left-wing nut jobs,' and suggested AI firms should donate equity to the government. Anthropic emphasized the need for a transparent, fair, and fact-based statutory process for blocking unsafe AI deployments. The White House did not immediately respond to a request for comment.
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