# Claude Fable 5.1 is here, and runs Ultra

_Release #060, September 2, 2026. Agent smarts_

Claude Fable 5.1 is available to every workspace, and the Ultra preset now uses it by default.

- **Fable 5.1 for all.** No beta flag needed. Pick it in the model picker.
- **Ultra upgraded.** The Ultra preset moves from Fable 5 to Fable 5.1 on its own.

Source: https://viktor.com/changelog/2026-09-02-claude-fable-5-1-here-runs-ultra