Claude Opus 5.5 is now available in GitHub Copilot
GitHub Changelog: Claude Opus 5.5, Anthropic’s newest Opus model, is now available in GitHub Copilot. Claude Opus 5.5 is now available in GitHub Copilot
By Dillip Chowdary • Sep 25, 2026 • Source: GitHub Changelog
What shipped in Claude Opus 5.5 is now available in GitHub
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GitHub Changelog reports: Claude Opus 5.5 is now available in GitHub Copilot. 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 .
What you gain from Claude Opus 5.5 is now available in GitHub
For primary quotes and complete technical detail, see GitHub Changelog's original report linked above.
Developer Action Items
- ☐ Diff the official changelog for Anthropic / Claude / GitHub 5.5 before you bump — APIs, defaults, and removed flags only.
- ☐ Install through the vendor's documented channel in staging; keep a one-command rollback and time-box the canary.
- ☐ Grep your repo for old flag names, lockfile pins, and plugin versions that the notes mark as breaking.
- ☐ Prefer the first patch cut over the day-zero tag unless you have a reason to be on the leading edge.
- ☐ If GitHub Changelog did not name a region, plan, or SKU, screenshot the official availability line before you promise it to users.
Author
Dillip Chowdary
Writes Tech Bytes coverage of AI, engineering, and the tools that actually ship. Editor of Tech Pulse Daily.
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