Can the U.S. government legally gatekeep global access to AI models?

Commerce Department ordered Anthropic on June 12 to immediately prevent all foreign nationals from using the artificial intelligence company’s two most advanced large language models, Anthropic disabled its Claude Fable 5 and Mythos 5 models within hours, making them inaccessible to everyone . The letter, citing national security concerns , barred access by all foreign nationals, including Anthropic’s own noncitizen employees.