Model and API retirements

Within 30 days64Firm dates ahead558

64 within 30 days · 558 firm dates ahead

GPT-5.1 retirement date and replacement

GitHub Copilot · Model · retired Apr 15, 2026 (retired)Unverified

Vendor page

Dates

Checked Nov 9, 2026 on GitHub's page
RetiredApr 15, 2026 (retired)
ReplacementLatest GPT Codex model
What it isGPT-5.1 stopped answering on GitHub Copilot.
Sourcedocs.github.com/en/copilot/reference/ai-models/supported-models

Changes

ReplacementUnverified

GitHub changed the replacement for GPT-5.1 from GPT-5.3-Codex to Latest GPT Codex model.

Oct 5Source

Around the same time on GitHub Copilot

GitHub
GitHub CopilotModelUnverified

Gemini 3 Pro

Stopped answering on GitHub Copilot.

retiredMar 26
GitHub CopilotModelUnverified

GPT-5.1-Codex

Stopped answering on GitHub Copilot.

retiredApr 1
GitHub CopilotModelUnverified

GPT-5.1-Codex-Max

Stopped answering on GitHub Copilot.

retiredApr 1
GitHub CopilotModelUnverified

GPT-5.1-Codex-Mini

Stopped answering on GitHub Copilot.

retiredApr 1
GitHub CopilotModelUnverified

Claude Sonnet

Stopped answering on GitHub Copilot.

retiredMay 1
GitHub CopilotModelUnverified

Grok Code Fast

Stopped answering on GitHub Copilot.

retiredMay 15