Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
Gemini 3 Pro is clearly ahead on the aggregate, 84 to 43. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Gemini 3 Pro's sharpest advantage is in multilingual, where it averages 89 against 87. The single biggest benchmark swing on the page is MMLU, 99 to 82. GPT-4o mini does hit back in coding, so the answer changes if that is the part of the workload you care about most.
Gemini 3 Pro gives you the larger context window at 2M, compared with 128K for GPT-4o mini.
Pick Gemini 3 Pro if you want the stronger benchmark profile. GPT-4o mini only becomes the better choice if coding is the priority.
Gemini 3 Pro
81.2
GPT-4o mini
82
Gemini 3 Pro
66.3
GPT-4o mini
87.2
Gemini 3 Pro
89
GPT-4o mini
87
Gemini 3 Pro is ahead overall, 84 to 43. The biggest single separator in this matchup is MMLU, where the scores are 99 and 82.
GPT-4o mini has the edge for knowledge tasks in this comparison, averaging 82 versus 81.2. Inside this category, MMLU is the benchmark that creates the most daylight between them.
GPT-4o mini has the edge for coding in this comparison, averaging 87.2 versus 66.3. Inside this category, HumanEval is the benchmark that creates the most daylight between them.
Gemini 3 Pro has the edge for multilingual tasks in this comparison, averaging 89 versus 87. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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