# Claude Fable 5.1 timeline

entity: /record/claude-fable-5-1.md  
id: ent_claude-fable-5-1  


## 2026

- 2026-09-01 | context_window | 1M token context window | valid | [clm_FF2C96341E44](/claim/clm_FF2C96341E44.md)
- 2026-09-01 | model_release | Claude Fable 5.1 | valid | [clm_B087F24135EA](/claim/clm_B087F24135EA.md)
- 2026-09-01 | predecessor | [Claude Fable 5](/record/claude-fable-5.md) | valid | [clm_D2DD5228FDA0](/claim/clm_D2DD5228FDA0.md)
- 2026-09-01 | price | $10 / $50 USD per MTok | valid | [clm_E7C68B66E02C](/claim/clm_E7C68B66E02C.md)

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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.