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Claude Opus 5.5 is now available in GitHub Copilot

GitHub via GitHub|Tuesday, September 22, 2026|about 2 hours ago|Allison

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Why It Matters

Claude Opus 5.5, Anthropic’s newest Opus model, is now available in GitHub Copilot.

Provenance

Discovered via GitHub and published by GitHub.

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Key Claims

You can use it for agentic coding, long-running agentic tasks, and knowledge work.
In early testing, Opus… The post Claude Opus 5.5 is now available in GitHub Copilot appeared first on The GitHub Blog .

Original description

Claude Opus 5.5, Anthropic’s newest Opus model, is now available in GitHub Copilot. You can use it for agentic coding, long-running agentic tasks, and knowledge work. In early testing, Opus… The post Claude Opus 5.5 is now available in GitHub Copilot appeared first on The GitHub Blog .

github changelog Release copilot github-blog publisher:github-blog tier:official

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ID: https://github.blog/changelog/2026-09-22-claude-opus-5-5-is-now-available-in-github-copilot · Indexed about 1 hour ago