Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
MiMo-V2-Flash 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 MiMo-V2-Flash.
Pick MiMo-V2-Flash if you want the stronger benchmark profile. GPT-5 nano only becomes the better choice if knowledge is the priority or you need the larger 400K context window.
MiMo-V2-Flash
65.5
GPT-5 nano
71.2
MiMo-V2-Flash
79.5
GPT-5 nano
85.2
MiMo-V2-Flash is ahead overall, 71 to 31. The biggest single separator in this matchup is GPQA, where the scores are 78 and 71.2.
GPT-5 nano has the edge for knowledge tasks in this comparison, averaging 71.2 versus 65.5. 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 79.5. Inside this category, AIME 2025 is the benchmark that creates the most daylight between them.
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