# Claude Sonnet 5.5 timeline

entity: /record/claude-sonnet-5-5.md  
id: ent_claude-sonnet-5-5  


## 2026

- 2026-09-28 | model_release | Claude Sonnet 5.5 | valid | [clm_B2E11E4198B9](/claim/clm_B2E11E4198B9.md)
- 2026-09-28 | predecessor | [Claude Sonnet 5](/record/claude-sonnet-5.md) | valid | [clm_BEF063B946C7](/claim/clm_BEF063B946C7.md)
- 2026-09-28 | price | $2 per million input tokens | valid | [clm_513F0F179518](/claim/clm_513F0F179518.md)

---

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