US bans Claude Fable 5 and Mythos for foreigners

14-Jun-2026

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Anthropic is disabling its advanced AI models, Fable 5 and Mythos 5, for all users following a US government export control order citing national security concerns about a potential security bypass. 

This move escalates tensions between AI developers and regulators amid fears that these models could enable sophisticated cyberattacks. While Anthropic disputes the government's rationale, it complies to ensure access restoration. 

The directive restricts foreign nationals' use, reflecting heightened US efforts to control AI capabilities amid global security concerns.