The United States government has directed Anthropic to limit foreign access to its most advanced artificial intelligence models due to national security concerns. As a result, Anthropic has suspended access to its Fable 5 and Mythos 5 models for all users outside the US. The move indicates growing US scrutiny of AI technology and its potential risks. Officials have not publicly detailed the specific threats prompting the restriction, but emphasize the need to safeguard sensitive information and capabilities. Anthropic has complied with the government’s directive, effectively blocking international use of these cutting-edge AI systems. This action highlights the increasing intersection of national security and the rapidly evolving field of artificial intelligence. The restrictions are currently limited to these specific models and do not appear to affect other Anthropic products or services accessible internationally.