# Claude Opus 4.1

id: ent_claude-opus-4-1  
kind: product  
timeline: /timelines/claude-opus-4-1.md  
page: /record/claude-opus-4-1  
same_as: https://asof.is/record/claude-opus-4-1 (how to cite the id: /identifiers.md)  

incremental update to Claude Opus 4

## 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 4.1 release date](/record/claude-opus-4-1/model_release.md)
- [Claude Opus 4.1 predecessor](/record/claude-opus-4-1/predecessor.md)
- [Claude Opus 4.1 deprecation](/record/claude-opus-4-1/deprecated.md)
- [Claude Opus 4.1 retirement](/record/claude-opus-4-1/retired.md)

## Current state

What the record asserts: claims that held, valid by their sources or primary-sourced at confidence 0.7 or more. Unverified, disputed, retracted and review-marked claims are listed below, labelled, not here.

- [Claude Opus 4.1](/record/claude-opus-4-1.md) | predecessor | [Claude Opus 4](/record/claude-opus-4.md) | valid 2025-08-05 to present | conf 0.95 | valid | [clm_BBADFC6DA1EF](/claim/clm_BBADFC6DA1EF.md)
  sources: https://platform.claude.com/docs/en/release-notes/overview

## All claims

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 Superseded claims stay visible.

- [Claude Opus 4.1](/record/claude-opus-4-1.md) | retired | claude-opus-4-1-20250805 | valid 2026-08-05 to present | conf 0.95 | valid | [clm_D5B285E2BC53](/claim/clm_D5B285E2BC53.md)
  sources: https://platform.claude.com/docs/en/about-claude/model-deprecations
- [Claude Opus 4.1](/record/claude-opus-4-1.md) | deprecated | claude-opus-4-1-20250805 | valid 2026-06-05 to present | conf 0.95 | valid | [clm_C4A9E812D526](/claim/clm_C4A9E812D526.md)
  sources: https://platform.claude.com/docs/en/about-claude/model-deprecations
- [Claude Opus 4.1](/record/claude-opus-4-1.md) | predecessor | [Claude Opus 4](/record/claude-opus-4.md) | valid 2025-08-05 to present | conf 0.95 | valid | [clm_BBADFC6DA1EF](/claim/clm_BBADFC6DA1EF.md)
  sources: https://platform.claude.com/docs/en/release-notes/overview

## 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 4.1](/record/claude-opus-4-1.md) | model_release | Claude Opus 4.1 | valid 2025-08-05 to present | conf 0.95 | valid | [clm_234B67F53ADD](/claim/clm_234B67F53ADD.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.