The Trump administration forced Anthropic to yank its Fable 5 and Mythos 5 models offline Friday via an export control order barring foreign nationals from access, citing national security concerns. The move caught the entire AI industry off guard and marks the federal government’s most aggressive intervention in AI deployment to date. Anthropic disabled both models for all users to comply, even though it believed the directive wasn’t warranted by the flagged security issue.

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