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[FEATURE]: Support for GitHub Copilot model GPT-5.3 Codex #15122
Description
Feature hasn't been suggested before.
- I have verified this feature I'm about to request hasn't been suggested before.
Describe the enhancement you want to request
I would like to request the integration of the GPT-5.3 Codex model into OpenCode. Although OpenAI has recently moved this model to General Availability and it is already accessible via the GitHub Copilot API in other clients (like VS Code , GH Copilot CLI ), OpenCode currently limits the selection to version 5.2 Codex.
What are the benefits of implementing this?
- Superior Logic: GPT-5.3 Codex offers a significant improvement in multi-file context handling and complex architectural reasoning compared to 5.2.
- Reduced Latency: The new iteration includes optimizations for streaming responses that would benefit the OpenCode TUI/CLI experience.
- Parity with official tools: Users expect OpenCode to support the same cutting-edge models available in official GitHub extensions.
Reacted by Drewry Pope, Jaesung, Terry Jia Yang Zhong, Ricardo Altamirano, Eloy Pérez, Adriel Fung, dalton-hill-0, Michail Koutsouris, Manos Parcharidis, fatbunboy and 5 more
Activity
github-actions commentedon Feb 25, 2026
This issue might be a duplicate of existing issues. Please check:
Please review those issues and consider continuing the discussion there if they cover the same request.
github-actions commentedon Apr 27, 2026
To stay organized issues are automatically closed after 60 days of no activity. If the issue is still relevant please open a new one.