Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Step 3.5 Flash has the cleaner overall profile here, landing at 66 versus 64. It is a real lead, but still close enough that category-level strengths matter more than the headline number.
Step 3.5 Flash's sharpest advantage is in coding, where it averages 47.1 against 43.8. The single biggest benchmark swing on the page is Terminal-Bench 2.0, 62 to 56.
Step 3.5 Flash gives you the larger context window at 256K, compared with 128K for Qwen2.5-72B.
Pick Step 3.5 Flash if you want the stronger benchmark profile. Qwen2.5-72B only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Step 3.5 Flash
60.2
Qwen2.5-72B
57.7
Step 3.5 Flash
47.1
Qwen2.5-72B
43.8
Step 3.5 Flash
66.7
Qwen2.5-72B
66.7
Step 3.5 Flash
78.3
Qwen2.5-72B
75.8
Step 3.5 Flash
60.8
Qwen2.5-72B
59.8
Step 3.5 Flash
87
Qwen2.5-72B
85
Step 3.5 Flash
82.8
Qwen2.5-72B
80.8
Step 3.5 Flash
84.5
Qwen2.5-72B
83.5
Step 3.5 Flash is ahead overall, 66 to 64. The biggest single separator in this matchup is Terminal-Bench 2.0, where the scores are 62 and 56.
Step 3.5 Flash has the edge for knowledge tasks in this comparison, averaging 60.8 versus 59.8. Inside this category, MMLU is the benchmark that creates the most daylight between them.
Step 3.5 Flash has the edge for coding in this comparison, averaging 47.1 versus 43.8. Inside this category, LiveCodeBench is the benchmark that creates the most daylight between them.
Step 3.5 Flash has the edge for math in this comparison, averaging 84.5 versus 83.5. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
Step 3.5 Flash has the edge for reasoning in this comparison, averaging 78.3 versus 75.8. Inside this category, MuSR is the benchmark that creates the most daylight between them.
Step 3.5 Flash has the edge for agentic tasks in this comparison, averaging 60.2 versus 57.7. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Step 3.5 Flash and Qwen2.5-72B are effectively tied for multimodal and grounded tasks here, both landing at 66.7 on average.
Step 3.5 Flash has the edge for instruction following in this comparison, averaging 87 versus 85. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Step 3.5 Flash has the edge for multilingual tasks in this comparison, averaging 82.8 versus 80.8. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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