Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Seed 1.6 Flash is clearly ahead on the aggregate, 56 to 41. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Seed 1.6 Flash's sharpest advantage is in multimodal & grounded, where it averages 73.1 against 41.5. The single biggest benchmark swing on the page is MMMU-Pro, 74 to 37.
Seed 1.6 Flash gives you the larger context window at 256K, compared with 128K for DeepSeek V3.1 (Reasoning).
Pick Seed 1.6 Flash if you want the stronger benchmark profile. DeepSeek V3.1 (Reasoning) only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Seed 1.6 Flash
54.5
DeepSeek V3.1 (Reasoning)
44.2
Seed 1.6 Flash
27.6
DeepSeek V3.1 (Reasoning)
19.9
Seed 1.6 Flash
73.1
DeepSeek V3.1 (Reasoning)
41.5
Seed 1.6 Flash
66.8
DeepSeek V3.1 (Reasoning)
45.8
Seed 1.6 Flash
47.3
DeepSeek V3.1 (Reasoning)
32.8
Seed 1.6 Flash
81
DeepSeek V3.1 (Reasoning)
70
Seed 1.6 Flash
72.8
DeepSeek V3.1 (Reasoning)
62.1
Seed 1.6 Flash
67.1
DeepSeek V3.1 (Reasoning)
46.1
Seed 1.6 Flash is ahead overall, 56 to 41. The biggest single separator in this matchup is MMMU-Pro, where the scores are 74 and 37.
Seed 1.6 Flash has the edge for knowledge tasks in this comparison, averaging 47.3 versus 32.8. Inside this category, MMLU is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for coding in this comparison, averaging 27.6 versus 19.9. Inside this category, HumanEval is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for math in this comparison, averaging 67.1 versus 46.1. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for reasoning in this comparison, averaging 66.8 versus 45.8. Inside this category, SimpleQA is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for agentic tasks in this comparison, averaging 54.5 versus 44.2. Inside this category, BrowseComp is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for multimodal and grounded tasks in this comparison, averaging 73.1 versus 41.5. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for instruction following in this comparison, averaging 81 versus 70. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Seed 1.6 Flash has the edge for multilingual tasks in this comparison, averaging 72.8 versus 62.1. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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