OpenAI GPT-5-Codex is rolling out in public preview for GitHub Copilot OpenAI’s GPT-5-Codex model, optimized for agentic coding, is now rolling out in GitHub Copilot Availability in GitHub Copilot GPT-5-Codex will be available to Copilot Pro, Pro+, Business, and Enterprise. You’ll be able to select the model in the Copilot Chat model picker from Visual Studio Code in ask, edit, and agent modes. Ro