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@AnthropicAI's Claude Opus 5.5 is now generally available in GitHub Copilot.
Our early testing shows it stands out in efficiency, delivering task resolution comparable to Claude Opus 5 while using significantly fewer steps and tokens, with fast error recovery on multistep tasks.
Try it out for agentic coding, long-running agentic tasks, and knowledge work. Find it in the GitHub Copilot app, CLI, and
@code.
github.blog/changelog/2026-0…