Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
Qwen3.5 397B (Reasoning) is clearly ahead on the aggregate, 82 to 31. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Qwen3.5 397B (Reasoning)'s sharpest advantage is in mathematics, where it averages 92.1 against 85.2. The single biggest benchmark swing on the page is GPQA, 89 to 71.2.
GPT-5 nano gives you the larger context window at 400K, compared with 128K for Qwen3.5 397B (Reasoning).
Pick Qwen3.5 397B (Reasoning) if you want the stronger benchmark profile. GPT-5 nano only becomes the better choice if you need the larger 400K context window.
Qwen3.5 397B (Reasoning)
77
GPT-5 nano
71.2
Qwen3.5 397B (Reasoning)
92.1
GPT-5 nano
85.2
Qwen3.5 397B (Reasoning) is ahead overall, 82 to 31. The biggest single separator in this matchup is GPQA, where the scores are 89 and 71.2.
Qwen3.5 397B (Reasoning) has the edge for knowledge tasks in this comparison, averaging 77 versus 71.2. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Qwen3.5 397B (Reasoning) has the edge for math in this comparison, averaging 92.1 versus 85.2. Inside this category, AIME 2025 is the benchmark that creates the most daylight between them.
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