The US government has mandated that Anthropic restrict access to its most powerful artificial intelligence models for all foreign users. This includes not only individuals outside the United States, but also foreign employees of Anthropic itself. The company has complied with the directive, effectively cutting off access to these advanced AI capabilities globally. The move signals increasing US scrutiny and control over the export of sensitive AI technology. Details regarding the specific rationale behind the restriction have not been fully disclosed, but it likely stems from national security concerns. This action impacts research, development, and potential applications of these AI models internationally. Anthropic confirmed it has disabled access for all affected users.