The US government has ordered artificial intelligence company Anthropic to halt access to its advanced AI models, Fable 5 and Mythos 5, for users located outside of the United States. This directive, stemming from export control regulations, effectively restricts foreign nationals from utilizing these specific AI technologies. Anthropic confirmed receiving the order and complying with the restrictions. The move signals increased US scrutiny over the export of cutting-edge AI capabilities, likely due to national security concerns. Details regarding the specific rationale behind the directive remain limited. This action could potentially impact international research and development efforts relying on these AI models. The restrictions highlight the growing geopolitical considerations surrounding the development and deployment of artificial intelligence.