# Claude Opus 4 timeline

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


## 2025

- 2025-05-22 | model_release | Claude Opus 4 | valid | [clm_0ED874A85CE1](/claim/clm_0ED874A85CE1.md)

## 2026

- 2026-04-14 | deprecated | claude-opus-4-20250514 | valid | [clm_A8CB4256B5E1](/claim/clm_A8CB4256B5E1.md)
- 2026-06-15 | retired | claude-opus-4-20250514 | valid | [clm_57DF26F2BB05](/claim/clm_57DF26F2BB05.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.