GPT-4.1 Deprecated (github.blog)

GitHub has announced the deprecation of the GPT-4.1 model across all Copilot experiences, including Copilot Chat and code completions, effective June 1, 2026. Users are encouraged to transition to the suggested alternative, GPT-5.5, to maintain their workflows and integrations. Enterprise administrators will need to enable access to GPT-5.5 through their model policies in the Copilot settings, ensuring availability in tools like VS Code and GitHub. This shift is significant for the AI/ML community as it marks a transition to more advanced model capabilities, potentially enhancing code generation and chat functionalities within GitHub's ecosystem. By moving away from GPT-4.1, developers can leverage the improved performance of GPT-5.5, which is expected to deliver better context understanding and coding suggestions. Administrators and users are encouraged to familiarize themselves with the updated documentation to smoothly navigate this change and maximize the capabilities of their AI-powered tools in coding projects.