Claude Fable 5.1
Top tier · Sep 2026New in September 2026 (API name claude-fable-5-1): Anthropic’s top-tier model for long-running agents at $10/$50 per million tokens, with cache reads down 75% to $0.25 per million and High effort as the default in Claude Code. Not included on Free; needs usage credits on Pro and 50% of weekly limits on Max.