Side-by-side benchmark comparison across knowledge, coding, math, and reasoning.
Qwen3.5 397B (Reasoning) is clearly ahead on the aggregate, 82 to 56. 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 coding, where it averages 67.7 against 49.3. The single biggest benchmark swing on the page is GPQA, 89 to 77.2. o3-mini does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.
o3-mini gives you the larger context window at 200K, compared with 128K for Qwen3.5 397B (Reasoning).
Pick Qwen3.5 397B (Reasoning) if you want the stronger benchmark profile. o3-mini only becomes the better choice if knowledge is the priority or you need the larger 200K context window.
Qwen3.5 397B (Reasoning)
77
o3-mini
82.1
Qwen3.5 397B (Reasoning)
67.7
o3-mini
49.3
Qwen3.5 397B (Reasoning)
92.1
o3-mini
87.3
Qwen3.5 397B (Reasoning)
89
o3-mini
93.9
Qwen3.5 397B (Reasoning) is ahead overall, 82 to 56. The biggest single separator in this matchup is GPQA, where the scores are 89 and 77.2.
o3-mini has the edge for knowledge tasks in this comparison, averaging 82.1 versus 77. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Qwen3.5 397B (Reasoning) has the edge for coding in this comparison, averaging 67.7 versus 49.3. Inside this category, SWE-bench Verified 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 87.3. Inside this category, AIME 2024 is the benchmark that creates the most daylight between them.
o3-mini has the edge for instruction following in this comparison, averaging 93.9 versus 89. Inside this category, IFEval is the benchmark that creates the most daylight between them.
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