# Claude Opus 4

> The large half of the generation that made Claude a coding model first and everything else second: sustained work measured in hours rather than answers measured in seconds, which is the shape every agent took afterwards. Thirteen months, and then the same funeral as Sonnet 4. Anthropic kept the weights; what closed was the endpoint.

2025-05-22 — 2026-06-15 · lived 1 year

Buried here: `claude-opus-4-20250514`

## The record

- Provider: Anthropic
- Model id: `claude-opus-4-20250514`
- Cause of death: Superseded
- Notice given: 2026-04-14
- Succeeded by: [Claude Opus 4.1](https://models.rip/claude-opus-4-1/epitaph) (this archive's reading of lineage, not the provider's migration guidance)

## Sources

- https://platform.claude.com/docs/en/about-claude/model-deprecations
- https://www.anthropic.com/news/claude-4

## Elsewhere

- [Stand at this grave](https://models.rip/claude-opus-4)
- [The Anthropic plot](https://models.rip/anthropic)
- [The whole cemetery](https://models.rip/)