US orders Anthropic to disable AI models for all foreign nationals

The US government ordered Anthropic, the company behind the Claude chatbot, to block foreign nationals from accessing its AI models Fable 5 and Mythos 5, including those currently in the US and working at Anthropic, citing national security concerns. The company complied immediately, cutting off access for everyone. The Mythos model is particularly adept at detecting software vulnerabilities, raising concerns it could become a cyberweapon. The full version of Mythos 5 remains available only to government agencies and selected corporate partners.