Model and API retirements

Within 30 days64Firm dates ahead558

64 within 30 days · 558 firm dates ahead

Claude Sonnet 3.5 retirement date and replacement

GitHub Copilot · Model · retired Nov 6, 2025 (retired)Unverified

Vendor page

Dates

Checked Nov 9, 2026 on GitHub's page
RetiredNov 6, 2025 (retired)
ReplacementLatest Claude Haiku model
What it isClaude Sonnet 3.5 stopped answering on GitHub Copilot.
Sourcedocs.github.com/en/copilot/reference/ai-models/supported-models

Changes

ReplacementUnverified

GitHub changed the replacement for Claude Sonnet 3.5 from Claude Haiku 4.5 to Latest Claude Haiku model.

Oct 5Source

Around the same time on GitHub Copilot

GitHub
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