Is Fable 5 back?

No. Claude Fable 5 (claude-fable-5) is not available right now. It has been offline since June 12, 2026, when a U.S. export-control directive suspended access. This page rechecks Anthropic's API every minute and updates the instant that changes.

When is Fable 5 coming back?

There is no announced return date for Claude Fable 5. Anthropic has said it is working to restore access after the June 12, 2026 U.S. export-control suspension of Fable 5 and Fable Mythos. The moment claude-fable-5 responds again, this page flips to Yes — and you can subscribe to be emailed when it does.

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.