Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
GPT-5.4 Pro is clearly ahead on the aggregate, 94 to 31. 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 knowledge, where it averages 88.8 against 71.2. The single biggest benchmark swing on the page is GPQA, 99 to 71.2.
GPT-5.4 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $0.05 input / $0.40 output per 1M tokens for GPT-5 nano. That is roughly 450.0x on output cost alone. GPT-5.4 Pro gives you the larger context window at 1.05M, compared with 400K for GPT-5 nano.
Pick GPT-5.4 Pro if you want the stronger benchmark profile. GPT-5 nano only becomes the better choice if you want the cheaper token bill.
GPT-5.4 Pro
88.8
GPT-5 nano
71.2
GPT-5.4 Pro
98
GPT-5 nano
85.2
GPT-5.4 Pro is ahead overall, 94 to 31. The biggest single separator in this matchup is GPQA, where the scores are 99 and 71.2.
GPT-5.4 Pro has the edge for knowledge tasks in this comparison, averaging 88.8 versus 71.2. Inside this category, GPQA is the benchmark that creates the most daylight between them.
GPT-5.4 Pro has the edge for math in this comparison, averaging 98 versus 85.2. Inside this category, AIME 2025 is the benchmark that creates the most daylight between them.
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