**US Orders Anthropic to Disable AI Models for Foreign Nationals Due to Security Concerns**
In a significant move, the United States government has mandated that Anthropic, a prominent artificial intelligence firm, restrict access to its advanced AI models, Fable 5 and Mythos 5, for all foreign nationals. This directive, issued on June 13, 2026, has raised concerns regarding national security and the potential misuse of AI technology.
Anthropic announced the enforcement of this order in a blog post, revealing that the directive was received shortly before 5:30 PM (21:21 GMT) on the same day. The company stated that the government did not provide detailed explanations regarding the specific security concerns that prompted this action. The restrictions extend to foreign nationals currently residing in the United States, including employees of Anthropic.
The AI models in question, particularly the Mythos 5, have garnered attention for their advanced capabilities in detecting software vulnerabilities. These vulnerabilities, some of which have remained undetected for years, can pose significant risks if exploited. The Mythos technology has been utilized by U.S. authorities and select corporations to enhance their cybersecurity measures. However, there is a growing apprehension that such powerful AI tools could become cyberweapons if they fall into the wrong hands.
The Fable 5 model, which was released just days prior to the order, is built upon the Mythos technology but has had its cybersecurity and biotechnology functionalities disabled for foreign users. Mythos 5, on the other hand, remains accessible only to government entities and specific corporate partners, ensuring that its capabilities are restricted to trusted users.
In its blog post, Anthropic indicated that it had received only partial information from the government regarding the rationale behind the order. The company reviewed a report that it believes may have triggered the government's decision. According to Anthropic's assessment, the report highlighted a limited capability of the AI to analyze specific program codes and correct errors. The firm emphasized that similar capabilities exist in models from other AI providers, such as OpenAI's GPT-5.5.
Anthropic expressed its disagreement with the government's decision to block access to the software used by millions of users worldwide. The company asserted that the safety measures integrated into Fable 5 have undergone extensive testing, suggesting that the risks cited by the government may not warrant such a sweeping ban.
This recent development follows Anthropic's earlier call for a coordinated pause among leading AI companies regarding the development of advanced AI systems. In a blog post earlier in June, the company warned that the rapid advancements in AI technology pose a risk of humans losing control over these systems. Anthropic proposed that a temporary halt in development could provide an opportunity for the world to assess the implications of these technologies.
As the landscape of artificial intelligence continues to evolve, the implications of this government order may resonate beyond Anthropic. The decision underscores the delicate balance between innovation and national security, as authorities grapple with the potential risks associated with powerful AI capabilities. The move has sparked a broader conversation about the responsibilities of AI companies and the need for regulatory frameworks that can effectively address the challenges posed by emerging technologies.
The future of AI development, particularly in relation to national security, remains uncertain as stakeholders navigate these complex issues. The response from the tech community and the public will likely shape the discourse surrounding AI governance in the coming months.