AI BriefingCopilot Discontinues GPT-4.1
Key point
GitHub Copilot will discontinue GPT-4.1 on June 1, 2026, and switch to GPT-5.5.
Details
Starting June 1, 2026, GitHub will discontinue GPT-4.1 across all Copilot experiences, presenting GPT-5.5 as the replacement model.
The scope of application is as follows.
- Copilot Chat
- inline edits
- ask and agent modes
- code completions
Copilot Enterprise administrators may need to turn on access to the replacement model under model policies in Copilot settings. Once enabled, it can be checked in the Copilot Chat model picker on VS Code and github.com, and no separate removal action is required after deprecation.
GitHub advised Enterprise customers to consult their account manager if they have further questions.
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