US Blocks Foreign Nationals From Anthropic's AI Systems

Federal government restricts access to Anthropic's Fable 5 and Mythos 5 AI systems, citing national security concerns.

US Blocks Foreign Nationals From Anthropic's AI Systems

The U.S. government has ordered restrictions on Anthropic's Mythos and Fable 5 AI systems, barring foreign nationals — including Anthropic's own staffers working in the U.S. — from accessing them. The company disclosed the federal mandate on Friday night.

National security concerns are driving the crackdown. The move signals a new phase in Washington's efforts to exert control over Anthropic and its AI capabilities.

The restrictions hit close to home for the company. Foreign national employees physically present in the U.S. are caught in the dragnet, raising immediate questions about Anthropic's workforce and day-to-day operations.

This isn't garden-variety export control. Blocking a company's own people from using its own tools represents an aggressive escalation in how the federal government is approaching AI governance and security.