U.S. Orders Anthropic to Block Foreign Access to Fable 5 and Mythos 5

The Commerce Department issued an export control directive on June 13, 2026, requiring Anthropic to restrict Fable 5 and Mythos 5 to U.S. users only. Anthropic disabled all access rather than attempt nationality-based filtering. The move represents the government's broadest restriction yet on frontier AI model access and signals that model weights now rank as strategic national security assets. European enterprises lost access without transition time, prompting EU Commission assessment of the directive's implications.