GitHub on X: “⚡️ @AnthropicAI's Claude Haiku 5.5 is now generally available in GitHu…”

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⚡️ @AnthropicAI's Claude Haiku 5.5 is now generally available in GitHub Copilot.

➡️ It's a lightweight model designed for fast, high-volume work like subagents, quick edits, and terminal tasks.
➡️ Our early testing showed that it matched Claude Sonnet 5 on many coding tasks

github.blogClaude Haiku 5.5 in GitHub Copilot - GitHub Changelog

Oct 7, 2026, 8:40 PM UTC

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