Claude Sonnet 5.5 in GitHub Copilot: Claude Sonnet 5.5, Anthropic’s newest
GitHub Changelog: Claude Sonnet 5.5, Anthropic’s newest Sonnet model, is now generally available in GitHub Copilot. Claude Sonnet 5.5 in GitHub Copilot: Claude.
By Dillip Chowdary • Oct 01, 2026 • Source: GitHub Changelog
What Claude Sonnet 5.5 in GitHub Copilot shipped
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GitHub Changelog reports: Claude Sonnet 5.5 in GitHub Copilot. Claude Sonnet 5.5, Anthropic’s newest Sonnet model, is now generally available in GitHub Copilot. It is designed for well-scoped everyday work like building features and fixing bugs. In our early… The post Claude Sonnet 5.5 in GitHub Copilot appeared first on The GitHub Blog .
How to install or upgrade Claude Sonnet 5.5 in GitHub Copilot
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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