Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Mellum2-12B-A2.5B-Thinking
59
MiMo-V2.5-Pro
86
Pick MiMo-V2.5-Pro if you want the stronger benchmark profile. Mellum2-12B-A2.5B-Thinking only becomes the better choice if coding is the priority.
Coding
+12.7 difference
Knowledge
+9.6 difference
Mellum2-12B-A2.5B-Thinking
MiMo-V2.5-Pro
N/A
$null / $null
N/A
N/A
N/A
N/A
128K
1M
Pick MiMo-V2.5-Pro if you want the stronger benchmark profile. Mellum2-12B-A2.5B-Thinking only becomes the better choice if coding is the priority.
MiMo-V2.5-Pro is clearly ahead on the provisional aggregate, 86 to 59. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
MiMo-V2.5-Pro gives you the larger context window at 1M, compared with 128K for Mellum2-12B-A2.5B-Thinking.
MiMo-V2.5-Pro is ahead on BenchLM's provisional leaderboard, 86 to 59.
Mellum2-12B-A2.5B-Thinking has the edge for knowledge tasks in this comparison, averaging 57.6 versus 48. MiMo-V2.5-Pro stays close enough that the answer can still flip depending on your workload.
Mellum2-12B-A2.5B-Thinking has the edge for coding in this comparison, averaging 69.9 versus 57.2. MiMo-V2.5-Pro stays close enough that the answer can still flip depending on your workload.
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