Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
DeepSeekMath V2 is clearly ahead on the aggregate, 71 to 31. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5 nano gives you the larger context window at 400K, compared with 128K for DeepSeekMath V2.
Pick DeepSeekMath V2 if you want the stronger benchmark profile. GPT-5 nano only becomes the better choice if mathematics is the priority or you need the larger 400K context window.
DeepSeekMath V2
67.2
GPT-5 nano
71.2
DeepSeekMath V2
80.4
GPT-5 nano
85.2
DeepSeekMath V2 is ahead overall, 71 to 31. The biggest single separator in this matchup is GPQA, where the scores are 79 and 71.2.
GPT-5 nano has the edge for knowledge tasks in this comparison, averaging 71.2 versus 67.2. Inside this category, GPQA is the benchmark that creates the most daylight between them.
GPT-5 nano has the edge for math in this comparison, averaging 85.2 versus 80.4. Inside this category, AIME 2025 is the benchmark that creates the most daylight between them.
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