Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Step 3.5 Flash is clearly ahead on the aggregate, 66 to 45. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Step 3.5 Flash's sharpest advantage is in coding, where it averages 47.1 against 15.8. The single biggest benchmark swing on the page is SWE-bench Verified, 48 to 9.
Step 3.5 Flash gives you the larger context window at 256K, compared with 128K for Llama 3 70B.
Pick Step 3.5 Flash if you want the stronger benchmark profile. Llama 3 70B only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Step 3.5 Flash
60.2
Llama 3 70B
41.2
Step 3.5 Flash
47.1
Llama 3 70B
15.8
Step 3.5 Flash
66.7
Llama 3 70B
52.3
Step 3.5 Flash
78.3
Llama 3 70B
59.6
Step 3.5 Flash
60.8
Llama 3 70B
42.2
Step 3.5 Flash
87
Llama 3 70B
77
Step 3.5 Flash
82.8
Llama 3 70B
67.5
Step 3.5 Flash
84.5
Llama 3 70B
63.3
Step 3.5 Flash is ahead overall, 66 to 45. The biggest single separator in this matchup is SWE-bench Verified, where the scores are 48 and 9.
Step 3.5 Flash has the edge for knowledge tasks in this comparison, averaging 60.8 versus 42.2. 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 15.8. Inside this category, SWE-bench Verified 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 63.3. 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 59.6. 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 41.2. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Step 3.5 Flash has the edge for multimodal and grounded tasks in this comparison, averaging 66.7 versus 52.3. Inside this category, OfficeQA Pro is the benchmark that creates the most daylight between them.
Step 3.5 Flash has the edge for instruction following in this comparison, averaging 87 versus 77. 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 67.5. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.
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