US Commerce Department Halts Foreigner Access to Claude Fable 5; Anthropic Disables It Entirely

The US Commerce Department on June 12, 2026 issued a directive citing national security to suspend access by foreign nationals to Anthropic's new Claude Fable 5 and Mythos 5 models, and because selective blocking was technically impossible, Anthropic immediately disabled both models for all users, including those in the US. It came just three days after their release.1