Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
GPT-5.4 Pro is clearly ahead on the aggregate, 94 to 42. 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 20.7. The single biggest benchmark swing on the page is LiveCodeBench, 86 to 11.
GPT-5.4 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Llama 4 Scout. That is roughly Infinityx on output cost alone. GPT-5.4 Pro is the reasoning model in the pair, while Llama 4 Scout is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Llama 4 Scout gives you the larger context window at 10M, compared with 1.05M for GPT-5.4 Pro.
Pick GPT-5.4 Pro if you want the stronger benchmark profile. Llama 4 Scout only becomes the better choice if you want the cheaper token bill or you need the larger 10M context window.
GPT-5.4 Pro
88.8
Llama 4 Scout
38.7
GPT-5.4 Pro
89
Llama 4 Scout
20.7
GPT-5.4 Pro
98
Llama 4 Scout
47.4
GPT-5.4 Pro
96.7
Llama 4 Scout
49.3
GPT-5.4 Pro
97
Llama 4 Scout
68
GPT-5.4 Pro
97
Llama 4 Scout
63
GPT-5.4 Pro is ahead overall, 94 to 42. The biggest single separator in this matchup is LiveCodeBench, where the scores are 86 and 11.
GPT-5.4 Pro has the edge for knowledge tasks in this comparison, averaging 88.8 versus 38.7. Inside this category, GPQA 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 20.7. 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 versus 47.4. 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 49.3. 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 68. 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 63. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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