GPT-5.3-Codex is now generally available for GitHub Copilot
GPT-5.3-Codex, OpenAI’s latest agentic coding model, is now rolling out in GitHub Copilot. In early testing, GPT-5.3-Codex reaches new high scores on benchmarks we use to evaluate coding, agentic, and real-world capabilities. It also has improved reasoning and execution in complex, tool-driven, long-running workflows which help it to deliver up to 25% faster performance than GPT-5.2-Codex on agentic coding tasks.
Availability in GitHub Copilot
GPT-5.3-Codex will be available to Copilot Pro, Pro+, Business, and Enterprise users.
You’ll be able to select the model in the model picker in:
- Visual Studio Code in all modes: chat, ask, edit, agent
- GitHub Mobile iOS and Android
- GitHub Copilot CLI
- GitHub Copilot Coding Agent
Rollout will be gradual. Check back soon if you don’t see it yet.
Enabling access
Copilot Enterprise and Copilot Business plan administrators must enable the GPT-5.3-Codex policy in Copilot settings.
Learn more
To explore all models available in GitHub Copilot, see our documentation on available models and get started with Copilot.
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