GPT models for Code Review Flow

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In previous versions of GitLab, Code Review Flow supported only Anthropic Claude models. Teams that could not use Anthropic models due to contractual, policy, or procurement constraints had no way to run Code Review Flow.

You can now select GPT-5.2 or GPT-5.3 Codex as the model for Code Review Flow. Top-level group Owners can switch the model for Agentic Code Review in Settings > GitLab Duo > Configure features, under GitLab Duo Agent Platform. The GPT models are hosted through the GitLab AI Gateway, so no additional configuration is required.

Both models passed benchmark evaluation against the GitLab Duo code review dataset, with review quality comparable to the default Claude Sonnet 4.6 Vertex model. See the code review benchmark for results.