Claude Fable 5 launches, included in paid plans only until June 22

What changed

Fable 5 launched on June 9, 2026 at $10 per million input tokens and $50 per million output tokens, and Claude Code added it in version 2.1.170. Pro, Max, Team and seat-based Enterprise plans included it at no extra cost through June 22; from June 23 those plans needed usage credits. The API and consumption-based Enterprise had full access from day one. Requests flagged for cybersecurity, bio/chem or distillation are answered by Claude Opus 4.8 instead, which Anthropic says happens in under 5% of sessions.

Who it affects

Claude Code users on Pro, Max, Team and Enterprise, and API customers.

What to do

Update to 2.1.170 or later, and decide whether to enable usage credits before relying on Fable daily.

Source: https://www.anthropic.com/news/claude-fable-5-mythos-5