On June 12, 2026, the Department of Commerce sent Anthropic an export control letter barring non-US persons from using Fable 5 and Mythos 5, forcing both models offline. Later reporting adds that the order arrived with 90 minutes of notice and that access was cut because Anthropic could not verify users. Anthropic has since built a single-button system to pull model access for everyone. The discussion treats the letter as the clearest case of Washington restricting access to a model after launch, and the open question is how far that gate extends.