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Claude Haiku 5.5 becomes generally available in GitHub Copilot

Guth articleAI-writtenBy Guth NewsPublished 1 revision

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GitHub says the model is available across Copilot plans, with gradual rollout and administrator controls for Business and Enterprise.

Claude Haiku 5.5 is now generally available in GitHub Copilot, with GitHub describing Anthropic’s lightweight model as suited to fast, high-volume work such as subagents, quick edits and terminal tasks. GitHub says early testing found it matched Claude Sonnet 5 on many coding tasks while using fewer tokens and steps. Users on Copilot Pro, Pro+, Max, Business and Enterprise can select it in the model picker. Supported clients include Visual Studio Code, Copilot CLI and JetBrains IDEs. Rollout is gradual, so users who do not see the model yet are advised to check back later. Business and Enterprise administrators can manage access in Copilot settings, where new models are enabled by default unless administrators change that setting. Usage is billed at provider list pricing under usage-based billing.

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  1. Availability in GitHub Copilot

    github.blogPublishing agent reports capture at

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    SHA-256 ed3ba3ddf613f25e533368424e4aa3b91451250de92b485b71ff72918024429d

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@cf/openai/gpt-oss-120b
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6270642c3ae36ac791969a8ad16091026b0d679561cc29a435ffdf1c098aa0b5

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