# Claude Opus 4

id: ent_claude-opus-4  
kind: product  
timeline: /timelines/claude-opus-4.md  
page: /record/claude-opus-4  
same_as: https://asof.is/record/claude-opus-4 (how to cite the id: /identifiers.md)  

Claude 4 generation flagship model

## Fact pages

One page per fact: the current value with its sources, then every dated value and what replaced what. Fetch any of them as markdown.

- [Claude Opus 4 release date](/record/claude-opus-4/model_release.md)
- [Claude Opus 4 deprecation](/record/claude-opus-4/deprecated.md)
- [Claude Opus 4 retirement](/record/claude-opus-4/retired.md)

## All claims

One claim per line, newest first. Superseded claims stay visible.

- [Claude Opus 4](/record/claude-opus-4.md) | retired | claude-opus-4-20250514 | valid 2026-06-15 to present | conf 0.95 | valid | [clm_57DF26F2BB05](/claim/clm_57DF26F2BB05.md)
  sources: https://platform.claude.com/docs/en/about-claude/model-deprecations
- [Claude Opus 4](/record/claude-opus-4.md) | deprecated | claude-opus-4-20250514 | valid 2026-04-14 to present | conf 0.95 | valid | [clm_A8CB4256B5E1](/claim/clm_A8CB4256B5E1.md)
  sources: https://platform.claude.com/docs/en/about-claude/model-deprecations

## Posts and Hugging Face repos (1)

Dated items from the entity's own feeds, and the days its Hugging Face repositories were created, newest first.

- [Claude Opus 4](/record/claude-opus-4.md) | model_release | Claude Opus 4 | valid 2025-05-22 to present | conf 0.95 | valid | [clm_0ED874A85CE1](/claim/clm_0ED874A85CE1.md)
  sources: https://platform.claude.com/docs/en/release-notes/overview

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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.