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AI summary
Written by AI from the official notes. Check them for exact details.The Claude Opus 3 model has been retired and is no longer accessible.
- Claude Opus 3 model retired; all requests return errors.
- Upgrade to Claude Opus 4.5 for improved intelligence.
- Ongoing access to Claude Opus 3 available for researchers.
Why it matters: Users of Claude Opus 3 should upgrade to avoid disruptions and benefit from enhanced features.
Full release notes
- We've retired the Claude Opus 3 model (
claude-3-opus-20240229). All requests to this model will now return an error. We recommend upgrading to Claude Opus 4.5, which offers significantly improved intelligence at a third of the cost. Researchers can request ongoing access to Claude Opus 3 on the API through the External Researcher Access Program.