Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Mellum2-12B-A2.5B-Thinking
59
Nemotron 3 Ultra
63
Verified leaderboard positions: Mellum2-12B-A2.5B-Thinking unranked · Nemotron 3 Ultra #24
Pick Nemotron 3 Ultra if you want the stronger benchmark profile. Mellum2-12B-A2.5B-Thinking only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Coding
+4.3 difference
Knowledge
+5.0 difference
Inst. Following
+5.2 difference
Mellum2-12B-A2.5B-Thinking
Nemotron 3 Ultra
N/A
$0 / $0
N/A
N/A
N/A
N/A
128K
1M
Pick Nemotron 3 Ultra if you want the stronger benchmark profile. Mellum2-12B-A2.5B-Thinking only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Nemotron 3 Ultra is clearly ahead on the provisional aggregate, 63 to 59. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Nemotron 3 Ultra's sharpest advantage is in instruction following, where it averages 81.7 against 76.5. The single biggest benchmark swing on the page is GPQA, 57.6% to 87%.
Nemotron 3 Ultra gives you the larger context window at 1M, compared with 128K for Mellum2-12B-A2.5B-Thinking.
Nemotron 3 Ultra is ahead on BenchLM's provisional leaderboard, 63 to 59. The biggest single separator in this matchup is GPQA, where the scores are 57.6% and 87%.
Nemotron 3 Ultra has the edge for knowledge tasks in this comparison, averaging 62.6 versus 57.6. Inside this category, GPQA is the benchmark that creates the most daylight between them.
Nemotron 3 Ultra has the edge for coding in this comparison, averaging 74.2 versus 69.9. Inside this category, LiveCodeBench is the benchmark that creates the most daylight between them.
Nemotron 3 Ultra has the edge for instruction following in this comparison, averaging 81.7 versus 76.5. Mellum2-12B-A2.5B-Thinking stays close enough that the answer can still flip depending on your workload.
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