Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemma 4 26B A4B
55
Mellum2-12B-A2.5B-Thinking
59
Pick Mellum2-12B-A2.5B-Thinking if you want the stronger benchmark profile. Gemma 4 26B A4B only becomes the better choice if you need the larger 256K context window.
Knowledge
+8.4 difference
Gemma 4 26B A4B
Mellum2-12B-A2.5B-Thinking
$0 / $0
N/A
N/A
N/A
N/A
N/A
256K
128K
Pick Mellum2-12B-A2.5B-Thinking if you want the stronger benchmark profile. Gemma 4 26B A4B only becomes the better choice if you need the larger 256K context window.
Mellum2-12B-A2.5B-Thinking is clearly ahead on the provisional aggregate, 59 to 55. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
Mellum2-12B-A2.5B-Thinking's sharpest advantage is in knowledge, where it averages 57.6 against 49.2.
Gemma 4 26B A4B gives you the larger context window at 256K, compared with 128K for Mellum2-12B-A2.5B-Thinking.
Mellum2-12B-A2.5B-Thinking is ahead on BenchLM's provisional leaderboard, 59 to 55.
Mellum2-12B-A2.5B-Thinking has the edge for knowledge tasks in this comparison, averaging 57.6 versus 49.2. Gemma 4 26B A4B stays close enough that the answer can still flip depending on your workload.
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