Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
Gemini 3 Pro Deep Think is clearly ahead on the aggregate, 85 to 56. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Gemini 3 Pro Deep Think's sharpest advantage is in coding, where it averages 69 against 49.3. The single biggest benchmark swing on the page is GPQA, 97 to 77.2. o3-mini does hit back in instruction following, so the answer changes if that is the part of the workload you care about most.
Gemini 3 Pro Deep Think gives you the larger context window at 2M, compared with 200K for o3-mini.
Pick Gemini 3 Pro Deep Think if you want the stronger benchmark profile. o3-mini only becomes the better choice if instruction following is the priority.
Gemini 3 Pro Deep Think
82.8
o3-mini
82.1
Gemini 3 Pro Deep Think
69
o3-mini
49.3
Gemini 3 Pro Deep Think
96.5
o3-mini
87.3
Gemini 3 Pro Deep Think
89
o3-mini
93.9
Gemini 3 Pro Deep Think is ahead overall, 85 to 56. The biggest single separator in this matchup is GPQA, where the scores are 97 and 77.2.
Gemini 3 Pro Deep Think has the edge for knowledge tasks in this comparison, averaging 82.8 versus 82.1. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Gemini 3 Pro Deep Think has the edge for coding in this comparison, averaging 69 versus 49.3. Inside this category, SWE-bench Verified is the benchmark that creates the most daylight between them.
Gemini 3 Pro Deep Think has the edge for math in this comparison, averaging 96.5 versus 87.3. Inside this category, AIME 2024 is the benchmark that creates the most daylight between them.
o3-mini has the edge for instruction following in this comparison, averaging 93.9 versus 89. Inside this category, IFEval is the benchmark that creates the most daylight between them.
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