Is Fable 5 back? Yes

Is Fable 5 back?

Yes. Claude Fable 5 (claude-fable-5) is available again through Anthropic's API.

When is Fable 5 coming back?

The US Department of Commerce has lifted the export controls on Fable 5 and Mythos 5. Anthropic will begin restoring access today!

Why was Fable 5 disabled?

Claude Fable 5 was disabled by a U.S. government export-control directive on June 12, 2026. Officials cited national-security concerns after claiming to have found a way to bypass the model's safeguards. Anthropic disagreed that the issue was significant — saying the same weakness is common across the industry — but complied while working to restore access. Read their full statement →

What is Fable 5?

Claude Fable 5 (claude-fable-5) is Anthropic's most capable Claude model, used for advanced reasoning and long-horizon agentic work. Its sibling model, Fable Mythos, was suspended at the same time.

How does this site know?

Every minute we query Anthropic's API with the model claude-fable-5. If it responds, Fable 5 is back; while access is suspended the API returns an error and we keep showing No.

Not affiliated with or endorsed by Anthropic.