Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Mellum2-12B-A2.5B-Thinking
59
MiMo-V2.5
72
Pick MiMo-V2.5 if you want the stronger benchmark profile. Mellum2-12B-A2.5B-Thinking only becomes the better choice if coding is the priority.
Coding
+13.8 difference
Mellum2-12B-A2.5B-Thinking
MiMo-V2.5
N/A
$null / $null
N/A
N/A
N/A
N/A
128K
1M
Pick MiMo-V2.5 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 is clearly ahead on the provisional aggregate, 72 to 59. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
MiMo-V2.5 gives you the larger context window at 1M, compared with 128K for Mellum2-12B-A2.5B-Thinking.
MiMo-V2.5 is ahead on BenchLM's provisional leaderboard, 72 to 59.
Mellum2-12B-A2.5B-Thinking has the edge for coding in this comparison, averaging 69.9 versus 56.1. MiMo-V2.5 stays close enough that the answer can still flip depending on your workload.
For engineers, researchers, and the plain curious — a weekly brief on new models, ranking shifts, and pricing changes.
Free. No spam. Unsubscribe anytime.