OpenAI - 1

2026 (4)

April (1)

github: GPT-5.5 is generally available for GitHub Copilot

GitHub

2026-04-24

GPT-5.5 is now generally available in GitHub Copilot. GitHub says early testing showed the model performs best on complex, multi-step agentic coding tasks and real-world problem solving.

March (2)

github: GPT-5.4 mini is now generally available for GitHub Copilot

GitHub

2026-03-17

GPT-5.4 mini is now generally available in GitHub Copilot and is rolling out to users. GitHub says early tests show it as OpenAI’s highest-performing mini agentic coding model.

github: GPT-5.4 is generally available in GitHub Copilot

GitHub

2026-03-05

GitHub Copilot is rolling out general availability of the GPT-5.4 model.

February (1)

github: Selected Anthropic and OpenAI models are now deprecated

GitHub

2026-02-19

GitHub deprecated a set of Anthropic and OpenAI models across all GitHub Copilot experiences effective February 17, 2026.