Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
GPT-5.4 Pro is clearly ahead on the aggregate, 91 to 87. 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 87.4 against 78.7. The single biggest benchmark swing on the page is LiveCodeBench, 86 to 75. GPT-5.3 Instant does hit back in multimodal & grounded, 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 $1.75 input / $14.00 output per 1M tokens for GPT-5.3 Instant. That is roughly 12.9x on output cost alone. GPT-5.4 Pro gives you the larger context window at 1.05M, compared with 128K for GPT-5.3 Instant.
Pick GPT-5.4 Pro if you want the stronger benchmark profile. GPT-5.3 Instant only becomes the better choice if multimodal & grounded is the priority or you want the cheaper token bill.
GPT-5.4 Pro
87.4
GPT-5.3 Instant
82.9
GPT-5.4 Pro
87.4
GPT-5.3 Instant
78.7
GPT-5.4 Pro
94.9
GPT-5.3 Instant
95
GPT-5.4 Pro
96.1
GPT-5.3 Instant
94.2
GPT-5.4 Pro
83.8
GPT-5.3 Instant
80.8
GPT-5.4 Pro
97
GPT-5.3 Instant
96
GPT-5.4 Pro
95.7
GPT-5.3 Instant
93.4
GPT-5.4 Pro
98.2
GPT-5.3 Instant
97.2
GPT-5.4 Pro is ahead overall, 91 to 87. The biggest single separator in this matchup is LiveCodeBench, where the scores are 86 and 75.
GPT-5.4 Pro has the edge for knowledge tasks in this comparison, averaging 83.8 versus 80.8. 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 87.4 versus 78.7. 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 98.2 versus 97.2. Inside this category, AIME 2025 is the benchmark that creates the most daylight between them.
GPT-5.4 Pro has the edge for reasoning in this comparison, averaging 96.1 versus 94.2. Inside this category, LongBench v2 is the benchmark that creates the most daylight between them.
GPT-5.4 Pro has the edge for agentic tasks in this comparison, averaging 87.4 versus 82.9. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.
GPT-5.3 Instant has the edge for multimodal and grounded tasks in this comparison, averaging 95 versus 94.9. Inside this category, MMMU-Pro 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 96. 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 95.7 versus 93.4. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.
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