Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
Gemini 3 Pro Deep Think is clearly ahead on the aggregate, 85 to 31. 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 knowledge, where it averages 82.8 against 71.2. The single biggest benchmark swing on the page is GPQA, 97 to 71.2.
Gemini 3 Pro Deep Think gives you the larger context window at 2M, compared with 400K for GPT-5 nano.
Pick Gemini 3 Pro Deep Think if you want the stronger benchmark profile. GPT-5 nano only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Gemini 3 Pro Deep Think
82.8
GPT-5 nano
71.2
Gemini 3 Pro Deep Think
96.5
GPT-5 nano
85.2
Gemini 3 Pro Deep Think is ahead overall, 85 to 31. The biggest single separator in this matchup is GPQA, where the scores are 97 and 71.2.
Gemini 3 Pro Deep Think has the edge for knowledge tasks in this comparison, averaging 82.8 versus 71.2. Inside this category, GPQA 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 85.2. Inside this category, AIME 2025 is the benchmark that creates the most daylight between them.
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