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github: Claude Opus 4.5 is now generally available in GitHub Copilot
Dec 18, 2025
Claude Opus 4.5 is now generally available in GitHub Copilot and can be accessed in GitHub Copilot Chat on github.com for Copilot Enterprise, Copilot Business, Copilot Pro, and Copilot Pro+ customers. The announcement was published on The GitHub Blog.
- Source: GitHub