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OpenAI Codex 5.4

Thus far I like it better than Codex 5.3

Jonathan Maietta's avatar
Jonathan Maietta
Mar 06, 2026
∙ Paid

I’m using Codex 5.4 with high reasoning in terminal. OpenAI released this model yesterday. It is currently fixing bugs for code written by 5.3 earlier last week for a new product feature. 5.4 found w…

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