Why Is Claude Fable 5 Banned? The US Export-Control Shutdown, Explained
💡 TL;DR / Summary (BLUF) What happened: On June 12, 2026, a US government export-control directive ordered Anthropic to suspend Claude Fable 5 and Mythos 5 for any foreign national. Unable to separate users in real time, Anthropic disabled both models for every customer worldwide. Not a ban by Anthropic: It is complying while disputing the rationale and says it is working to restore access. This is a government order, not a product decision — and not necessarily permanent. What to do now: Every other Claude model still works. Switch to Opus 4.8 (or Sonnet 4.6 / Haiku 4.5), or leave your model on default. Sessions pinned to Fable 5 will error. “The US government, citing national security authorities, has issued an export control directive to suspend all access to Fable 5 and Mythos 5 by any foreign national, whether inside or outside the United States, including foreign national Anthropic employees.” — Anthropic, official statement, June 12, 2026 ...