GPT-5.4 vs GPT-5.4 Pro

GPT-5.4 makes more sense if knowledge is the priority or you want the cheaper token bill, while GPT-5.4 Pro is the cleaner fit if multimodal & grounded is the priority.

GPT-5.4 and GPT-5.4 Pro sit in the same GPT-5.4 family. This page is less about two unrelated model lineages and more about how the siblings trade off on benchmark shape, token costs, and practical limits like context window.

GPT-5.4 Pro is clearly ahead on the provisional aggregate, 92 to 88. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.

GPT-5.4 Pro's sharpest advantage is in multimodal & grounded, where it averages 94 against 68.6. The single biggest benchmark swing on the page is MMMU-Pro, 81.2% to 94%. GPT-5.4 does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.

GPT-5.4 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $2.50 input / $15.00 output per 1M tokens for GPT-5.4. That is roughly 12.0x on output cost alone.