U.S. Government Directs Anthropic to Shut Down Fable 5 and Mythos 5 Models on National Security Grounds
Summary
Anthropic launched Fable 5 and Mythos 5, then had to disable access after a U.S. government export-control directive. The order applies to foreign nationals, including foreign national Anthropic employees, and forces the company to suspend all customer access to those models. Anthropic says the government acted over concerns that the models could be jailbroken, but it did not provide detailed public reasons. The event highlights how quickly AI model availability can change when regulatory or national-security scrutiny intensifies.
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