Claude Haiku 5.5 is now generally available in GitHub Copilot, according to GitHub’s changelog. The model is described as a lightweight option intended for fast, high-volume work such as subagents, quick edits, and terminal tasks.
PERFORMANCE AND USE CASES
In early testing, Claude Haiku 5.5 matched Claude Sonnet 5 on many coding tasks while using significantly fewer tokens and steps, according to the same source. The model is billed at provider list pricing under usage-based billing. TechStaged has also covered GitHub Copilot adds general availability for local sandboxing across CLI, app, and VS Code.
AVAILABILITY AND ACCESS
Claude Haiku 5.5 is available to Copilot Pro, Pro+, Max, Business, and Enterprise users. Users can select the model in the model picker. Rollout is gradual, and administrators can manage access through the model policy in Copilot settings.
WHAT THIS MEANS FOR COPILOT USERS
GitHub notes that Claude Haiku 5.5 is intended to support fast workflows and high-volume tasks within Copilot. For those administering Copilot in organizations, default model enablement can be controlled, with new models being automatically enabled unless disabled by an administrator.
RELATED COVERAGE
- GitHub Copilot adds general availability for local sandboxing across CLI, app, and VS Code
- GitHub Copilot code review gains API access and a new default effort level
- GitHub Copilot deprecates selected models across all experiences
- GitHub completes staged rollout of stateless App installation tokens, with longer token format and unchanged permissions
- Developer Tools articles
SOURCES
- Archive: 2026 - GitHub Changelog: Claude Haiku 5.5 in GitHub Copilot Published · Primary source
