r/codex•
evilRainbow

Little success with 5.4. 5.2 is still the model to beat. Anyone else?

Complaint

5.2 high still regularly astounds me with it's thoroughness.

No matter how I prompt 5.4, and how many guards rails and "only do what you're told" instructions, it is always over confident and makes plans full of holes.

I asked 5.4 to create a plan for a very specific and sensitive feature. It confidently gave me a plan. I fed it back into 5.2 and 5.2 was like bruh, this plan is horrible and ignores the actual code reality of the repo.

Anyone with similar experience? Any solution? I want to like 5.4 because it's fast, but it reminds me exactly of opus and Gemini. Confidently wrong.

5.4 and 5.3 codex are equally dangerous in my experience.

Posted Mar 15, 2026, 8:22 PM UTC

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