Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
DeepSeek V3 is clearly ahead on the aggregate, 25 to 14. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
DeepSeek V3's sharpest advantage is in mathematics, where it averages 90.2 against 30. The single biggest benchmark swing on the page is MMLU, 88.5% to 31%. GPT-OSS 20B does hit back in reasoning, so the answer changes if that is the part of the workload you care about most.
Pick DeepSeek V3 if you want the stronger benchmark profile. GPT-OSS 20B only becomes the better choice if reasoning is the priority.
Benchmark data for this category is coming soon.
DeepSeek V3
42
GPT-OSS 20B
23
Benchmark data for this category is coming soon.
DeepSeek V3
24.9
GPT-OSS 20B
27.9
DeepSeek V3
69.6
GPT-OSS 20B
29
Benchmark data for this category is coming soon.
Benchmark data for this category is coming soon.
DeepSeek V3
90.2
GPT-OSS 20B
30
DeepSeek V3 is ahead overall, 25 to 14. The biggest single separator in this matchup is MMLU, where the scores are 88.5% and 31%.
DeepSeek V3 has the edge for knowledge tasks in this comparison, averaging 69.6 versus 29. Inside this category, MMLU is the benchmark that creates the most daylight between them.
DeepSeek V3 has the edge for coding in this comparison, averaging 42 versus 23. GPT-OSS 20B stays close enough that the answer can still flip depending on your workload.
DeepSeek V3 has the edge for math in this comparison, averaging 90.2 versus 30. Inside this category, AIME 2024 is the benchmark that creates the most daylight between them.
GPT-OSS 20B has the edge for reasoning in this comparison, averaging 27.9 versus 24.9. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
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