Unverified50% confidenceOpinionExact time

A minor version number (such as 5.5) typically implies capability enhancements built on the existing architecture rather than an entirely new architecture.

1

Sources

50%

Confidence

Long-term

Relevance

9/22/2026

First Seen

Sources

Claude Opus 5.5 Spotted in GitHub Commits — Anthropic's Next Flagship Model Takes Shape

Related Entities

Claude Opus 5.5model

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