GPT-5.3-Codex is amazing - first Codex model that actually replaces the generalist
been testing 5.3 codex extensively and this is genuinely the first codex model that can replace the generalist for almost everything 5.2 high was great but took forever to solve complex tasks. yeah the quality was there but you'd wait 5-10 minutes for it to think through architecture decisions 5.3 codex solves the same problems with the same quality but way faster. it has: * deep reasoning that matches 5.2 quality * insane attention to detail * **way better speed** without sacrificing accurac...
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