# Claude Mythos 5.1 timeline

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


## 2026

- 2026-09-01 | model_release | Claude Mythos 5.1 | valid | [clm_7B89C517BB64](/claim/clm_7B89C517BB64.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.