U.S. Restricts Access to Anthropic's Latest AI Models to American Users Only

The Commerce Department ordered Anthropic on June 13 to block foreign users from accessing its Fable 5 and Mythos 5 models. Rather than attempt nationality-based filtering, Anthropic disabled all access. The move is the government's broadest curb yet on frontier AI model availability and treats the underlying technology—the model weights—as a strategic national asset. European enterprises lost service immediately.