Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
Nemotron 3 Ultra 500B is clearly ahead on the aggregate, 67 to 31. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Nemotron 3 Ultra 500B gives you the larger context window at 10M, compared with 400K for GPT-5 nano.
Pick Nemotron 3 Ultra 500B if you want the stronger benchmark profile. GPT-5 nano only becomes the better choice if mathematics is the priority.
Nemotron 3 Ultra 500B
62.5
GPT-5 nano
71.2
Nemotron 3 Ultra 500B
74.4
GPT-5 nano
85.2
Nemotron 3 Ultra 500B is ahead overall, 67 to 31. The biggest single separator in this matchup is AIME 2025, where the scores are 75 and 85.2.
GPT-5 nano has the edge for knowledge tasks in this comparison, averaging 71.2 versus 62.5. 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 74.4. Inside this category, AIME 2025 is the benchmark that creates the most daylight between them.
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