# Claude Sonnet 4 timeline

entity: /record/claude-sonnet-4.md  
id: ent_claude-sonnet-4  


## 2025

- 2025-05-22 | model_release | Claude Sonnet 4 | valid | [clm_37A3AD4B36BA](/claim/clm_37A3AD4B36BA.md)
- 2025-05-22 | predecessor | Claude Sonnet 3.7 | valid | [clm_320E94CA1F36](/claim/clm_320E94CA1F36.md)

## 2026

- 2026-04-14 | deprecated | claude-sonnet-4-20250514 | valid | [clm_8120237C129C](/claim/clm_8120237C129C.md)
- 2026-06-15 | retired | claude-sonnet-4-20250514 | valid | [clm_A77C1EA3626C](/claim/clm_A77C1EA3626C.md)

---

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