Side-by-side benchmark comparison across agentic, coding, multimodal, knowledge, reasoning, and math workflows.
Nemotron 3 Ultra 500B is clearly ahead on the aggregate, 64 to 30. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Nemotron 3 Ultra 500B's sharpest advantage is in reasoning, where it averages 77.2 against 32.1. The single biggest benchmark swing on the page is HumanEval, 66 to 14.
Nemotron 3 Ultra 500B is the reasoning model in the pair, while LFM2.5-1.2B-Instruct is not. That usually helps on harder chain-of-thought-heavy tests, but it can also mean more latency and more token spend in real use. Nemotron 3 Ultra 500B gives you the larger context window at 10M, compared with 32K for LFM2.5-1.2B-Instruct.
Pick Nemotron 3 Ultra 500B if you want the stronger benchmark profile. LFM2.5-1.2B-Instruct only becomes the better choice if you would rather avoid the extra latency and token burn of a reasoning model.
Nemotron 3 Ultra 500B
62.8
LFM2.5-1.2B-Instruct
25.7
Nemotron 3 Ultra 500B
43.8
LFM2.5-1.2B-Instruct
7.2
Nemotron 3 Ultra 500B
66.9
LFM2.5-1.2B-Instruct
32.4
Nemotron 3 Ultra 500B
77.2
LFM2.5-1.2B-Instruct
32.1
Nemotron 3 Ultra 500B
57
LFM2.5-1.2B-Instruct
26
Nemotron 3 Ultra 500B
84
LFM2.5-1.2B-Instruct
80
Nemotron 3 Ultra 500B
79.7
LFM2.5-1.2B-Instruct
60.7
Nemotron 3 Ultra 500B
78
LFM2.5-1.2B-Instruct
37
Nemotron 3 Ultra 500B is ahead overall, 64 to 30. The biggest single separator in this matchup is HumanEval, where the scores are 66 and 14.
Nemotron 3 Ultra 500B has the edge for knowledge tasks in this comparison, averaging 57 versus 26. Inside this category, MMLU is the benchmark that creates the most daylight between them.
Nemotron 3 Ultra 500B has the edge for coding in this comparison, averaging 43.8 versus 7.2. Inside this category, HumanEval is the benchmark that creates the most daylight between them.
Nemotron 3 Ultra 500B has the edge for math in this comparison, averaging 78 versus 37. Inside this category, AIME 2023 is the benchmark that creates the most daylight between them.
Nemotron 3 Ultra 500B has the edge for reasoning in this comparison, averaging 77.2 versus 32.1. Inside this category, MRCRv2 is the benchmark that creates the most daylight between them.
Nemotron 3 Ultra 500B has the edge for agentic tasks in this comparison, averaging 62.8 versus 25.7. Inside this category, Terminal-Bench 2.0 is the benchmark that creates the most daylight between them.
Nemotron 3 Ultra 500B has the edge for multimodal and grounded tasks in this comparison, averaging 66.9 versus 32.4. Inside this category, OfficeQA Pro is the benchmark that creates the most daylight between them.
Nemotron 3 Ultra 500B has the edge for instruction following in this comparison, averaging 84 versus 80. Inside this category, IFEval is the benchmark that creates the most daylight between them.
Nemotron 3 Ultra 500B has the edge for multilingual tasks in this comparison, averaging 79.7 versus 60.7. Inside this category, MGSM is the benchmark that creates the most daylight between them.
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