Codex and Copilot CLI Face-Off: Surprising Results!

This research provides a fascinating comparison between Codex CLI and Copilot CLI, finding that their performance in a review task is surprisingly similar. The results highlight that engineers can confidently choose either tool for code review, as any differences are minimal.

• •Codex CLI and Copilot CLI showed very similar response times.
• •Quality of output was also nearly identical between the two tools.
• •Codex CLI showed slightly better efficiency but the difference is negligible in practice.