GPT-5.3-Codex becomes my new main model
I was stunned for a moment when I saw it, then realized “plan” was translated as “package” GPT5.2high is ridiculously slow, GPT5.3 hasn’t been released yet, but 5.3-codex came out first. In actual testing, the speed improvement is significant, and the logic capability drop is not as obvious as the drop from GPT-5.2-Codex compared to GPT5.2. It is a specialized coding model worth switching to…
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I was stunned for a moment when I saw it, then realized “plan” was translated as “package”. GPT5.2high is ridiculously slow, GPT5.3 hasn’t been released yet, but 5.3-codex came out first. In actual testing, the speed improvement is significant, and the logic capability drop is not as obvious as the drop from GPT-5.2-Codex compared to GPT5.2. It is a specialized coding model worth switching to.
