Language modelActive
Claude Fable 5.1
Anthropic
- Released
- September 1, 2026
- Data date
- September 2, 2026
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Position within the category
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- 0 / 4
Leaderboard
1Claude Opus 588.9 / 100
2Gemini 3.8 Flash88.5 / 100
3Claude Fable 583.2 / 100
25MiMo-V2.5-Pro12.5 / 100
—Claude Fable 5.1, Current modelNot ranked
Profile
Specifications and access
Published information about this model. Unknown values are not estimated.
- Model type
- ProprietarySource
- Context window
- 1,000,000 tokensSource
- Knowledge cutoff
- June 2026Source
- Notes
- Released September 1, 2026. Anthropic positions Fable 5.1 for long-running agents, advanced coding, multistep research, and document, spreadsheet, and presentation work. 1M context, 128K output, adaptive thinking, and high effort by default. Official API ID: claude-fable-5-1.Source
Pricing
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Evidence
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