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 48. 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 44.7. The single biggest benchmark swing on the page is MMMU-Pro, 74 to 37. Nemotron Ultra 253B does hit back in coding, so the answer changes if that is the part of the workload you care about most.
Seed 1.6 Flash gives you the larger context window at 256K, compared with 32K for Nemotron Ultra 253B.
Pick Seed 1.6 Flash if you want the stronger benchmark profile. Nemotron Ultra 253B only becomes the better choice if coding is the priority.
Seed 1.6 Flash
54.5
Nemotron Ultra 253B
46.7
Seed 1.6 Flash
27.6
Nemotron Ultra 253B
33.7
Seed 1.6 Flash
73.1
Nemotron Ultra 253B
44.7
Seed 1.6 Flash
66.8
Nemotron Ultra 253B
53.3
Seed 1.6 Flash
47.3
Nemotron Ultra 253B
42.4
Seed 1.6 Flash
81
Nemotron Ultra 253B
78
Seed 1.6 Flash
72.8
Nemotron Ultra 253B
70.1
Seed 1.6 Flash
67.1
Nemotron Ultra 253B
59.7
Seed 1.6 Flash is ahead overall, 56 to 48. 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 42.4. Inside this category, MMLU is the benchmark that creates the most daylight between them.
Nemotron Ultra 253B has the edge for coding in this comparison, averaging 33.7 versus 27.6. 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 59.7. 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 53.3. Inside this category, MRCRv2 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 46.7. 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 44.7. 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 78. 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 70.1. Inside this category, MMLU-ProX is the benchmark that creates the most daylight between them.
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