The US government ordered Anthropic to block all foreign nationals from accessing its latest AI models Fable 5 and Mythos 5, citing national security. Anthropic complied immediately but disagreed with the order, noting the specific security concerns were not detailed.
The US government ordered AI company Anthropic to block all foreign nationals from accessing its latest AI models, Fable 5 and Mythos 5, citing national security concerns. The order applies to foreigners in the US, including Anthropic employees, and the company complied immediately.
Anthropic's Mythos AI model is particularly adept at detecting software vulnerabilities, including some that have remained undiscovered for decades. This capability has been used by US authorities and selected companies to plug security gaps, but there have been concerns it could become a dangerous cyberweapon in the wrong hands. Fable 5 is based on Mythos technology but has cybersecurity and biotechnology capabilities blocked, while Mythos 5 is the full non-public version restricted to government agencies and selected corporate partners.
This action highlights the growing government control over AI technology for military and security purposes. Anthropic disagrees with the decision, noting that similar capabilities exist in other models like OpenAI's GPT-5.5. It underscores the tension between AI safety and national security, and the potential international ramifications of regulating advanced AI.
Commenters expressed concern that the US government's ban on Anthropic's AI models for foreign nationals could strengthen competitive advantages and inequality for countries controlling AI technology. They pointed out that US-based LLM companies collect global user data and may leverage it for information superiority, which some argued is far more dangerous than designating specific companies like Huawei as national security threats.