Washington Reopens Anthropic's Mythos Model to More Than 100 Trusted United States Firms

On June 12, the United States government, citing national-security authorities, ordered Anthropic to suspend all access to its Fable 5 and Mythos 5 models for any foreign national, including Anthropic's own non-citizen employees. Officials said they had learned of a technique to bypass Fable 5's safeguards. Anthropic countered that the technique was narrow, unlocking certain cybersecurity capabilities in one specific case rather than defeating the model's protections universally. The company also argued that recalling a deployed model on that basis would halt new releases across the industry.

Two weeks later the administration reversed much of that order. Commerce Secretary Howard Lutnick wrote to Anthropic that "appropriate safeguards are in place to permit certain trusted partners to access the Claude Mythos 5 Model," clearing the model for more than 100 United States institutions, including Fortune 500 firms and government agencies. Commerce also dropped the requirement for an export license when trusted organizations let their non-citizen employees use Mythos 5. A Russian-language technology channel described the move as the first relaxation since the government asserted control over the distribution of Anthropic's products.

The episode establishes a precedent that matters more than the specific model. The government demonstrated it can enable or disable a commercially deployed frontier model and decide which domestic entities may use it. The list of approved companies has not been published, though many are believed to belong to Anthropic's Project Glasswing program.