Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
GPT-5.4 Pro is clearly ahead on the aggregate, 94 to 76. 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 coding, where it averages 89 against 56. The single biggest benchmark swing on the page is LiveCodeBench, 86 to 40.
GPT-5.4 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $10.00 input / $40.00 output per 1M tokens for o3. That is roughly 4.5x on output cost alone. GPT-5.4 Pro gives you the larger context window at 1.05M, compared with 200K for o3.
Pick GPT-5.4 Pro if you want the stronger benchmark profile. o3 only becomes the better choice if you want the cheaper token bill.
GPT-5.4 Pro
88.8
o3
73.3
GPT-5.4 Pro
89
o3
56
GPT-5.4 Pro
98
o3
87.1
GPT-5.4 Pro
96.7
o3
84
GPT-5.4 Pro
97
o3
85
GPT-5.4 Pro
97
o3
83
GPT-5.4 Pro is ahead overall, 94 to 76. The biggest single separator in this matchup is LiveCodeBench, where the scores are 86 and 40.
GPT-5.4 Pro has the edge for knowledge tasks in this comparison, averaging 88.8 versus 73.3. Inside this category, HLE is the benchmark that creates the most daylight between them.
GPT-5.4 Pro has the edge for coding in this comparison, averaging 89 versus 56. Inside this category, LiveCodeBench 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 87.1. Inside this category, HMMT Feb 2023 is the benchmark that creates the most daylight between them.
GPT-5.4 Pro has the edge for reasoning in this comparison, averaging 96.7 versus 84. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
GPT-5.4 Pro has the edge for instruction following in this comparison, averaging 97 versus 85. Inside this category, IFEval is the benchmark that creates the most daylight between them.
GPT-5.4 Pro has the edge for multilingual tasks in this comparison, averaging 97 versus 83. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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