# Claude Opus 5.5 is now generally available in GitHub Copilot

AnthropicAI's Claude Opus 5.5 is generally available in GitHub Copilot for agentic coding, long-running agentic tasks, and knowledge work. GitHub's early testing found task resolution comparable to Claude Opus 5, with significantly fewer steps and tokens and fast error recovery on multistep tasks.

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Source: GitHub · Published 9/22/2026, 10:40:39

AnthropicAI's Claude Opus 5.5 is now [generally available in GitHub Copilot](https://github.blog/changelog/2026-09-22-claude-opus-5-5-is-now-available-in-github-copilot). It is available for agentic coding, long-running agentic tasks, and knowledge work in the GitHub Copilot app, the CLI, and code.

GitHub's early testing found that Claude Opus 5.5 delivered task resolution comparable to Claude Opus 5 while using significantly fewer steps and tokens, with fast error recovery on multistep tasks.

Tags: Claude Opus, GitHub Copilot, AnthropicAI, GitHub

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