Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
LFM2.5-230M
17
Mellum2-12B-A2.5B-Instruct
26
Pick Mellum2-12B-A2.5B-Instruct if you want the stronger benchmark profile. LFM2.5-230M only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Knowledge
+20.6 difference
Inst. Following
+4.1 difference
LFM2.5-230M
Mellum2-12B-A2.5B-Instruct
$0 / $0
N/A
N/A
N/A
N/A
N/A
32K
128K
Pick Mellum2-12B-A2.5B-Instruct if you want the stronger benchmark profile. LFM2.5-230M only becomes the better choice if its workflow or ecosystem matters more than the raw scoreboard.
Mellum2-12B-A2.5B-Instruct is clearly ahead on the provisional aggregate, 26 to 17. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Mellum2-12B-A2.5B-Instruct's sharpest advantage is in knowledge, where it averages 40.9 against 20.3. The single biggest benchmark swing on the page is IFEval, 71.7% to 75.8%.
Mellum2-12B-A2.5B-Instruct gives you the larger context window at 128K, compared with 32K for LFM2.5-230M.
Mellum2-12B-A2.5B-Instruct is ahead on BenchLM's provisional leaderboard, 26 to 17. The biggest single separator in this matchup is IFEval, where the scores are 71.7% and 75.8%.
Mellum2-12B-A2.5B-Instruct has the edge for knowledge tasks in this comparison, averaging 40.9 versus 20.3. LFM2.5-230M stays close enough that the answer can still flip depending on your workload.
Mellum2-12B-A2.5B-Instruct has the edge for instruction following in this comparison, averaging 75.8 versus 71.7. Inside this category, IFEval is the benchmark that creates the most daylight between them.
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