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GitHub Copilot Deprecates Claude Haiku 4.5 in Dec 2026
GitHub Changeloghigh confidence
Why it matters
- →Developers relying on Haiku 4.5 for fast, low-latency code completions must plan a migration path before late 2026.
- →Enterprise admins need to audit Copilot settings to ensure alternative models are enabled and compliant with internal policies.
- →The exemption for individual annual subscribers highlights a tiered access strategy that may fragment the user experience.
GitHub has announced that Claude Haiku 4.5 will be deprecated across all Copilot experiences, including Chat, inline edits, and agent modes, effective December 14, 2026. The deprecation applies to Copilot Business and Enterprise customers, though individual subscribers on annual plans are exempt. Administrators must update model policies to ensure access to supported alternatives, as the default model enablement will shift automatically unless manually disabled. GitHub Enterprise customers are advised to contact their account teams for assistance with this transition.
Read originalThe story around this
Earlier coverage that leads up to this article, and what followed. Lines connect each piece to the closest one after it, converging here.
How we got here
- 1GitHub Copilot Models Deprecated
GitHub Changelog · August 31, 2026 · Same story
- 2Claude Haiku 5.5 arrives in GitHub Copilot
GitHub Changelog · October 7, 2026 · Same story
- 3Claude Code v2.1.293 updates Haiku and fixes agent bugs
Claude Code Releases · October 10, 2026 · Related
- 4Anthropic Launches Claude Haiku 5.5
Matt Wolfe · October 19, 2026 · Related
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