The Trump administration has ordered Anthropic to block access to its most advanced AI models, Mithos and Fable 5. This unprecedented move follows a discovery by the Department of Commerce regarding a potential "jailbreak" that could bypass the systems' built-in protections. Washington officials fear these powerful tools could be exploited to identify cyber vulnerabilities in strategic infrastructure. While the government's directive specifically targeted foreign citizens and organizations, Anthropic opted for a total global suspension of both models. The company stated it could not reliably verify the origin of all its users. This decision intensifies the ongoing conflict between the U.S. government and Big Tech over the control of emerging technologies.