Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemma 4 12B
53
MiMo-V2.5
72
Pick MiMo-V2.5 if you want the stronger benchmark profile. Gemma 4 12B only becomes the better choice if coding is the priority.
Coding
+15.9 difference
Multimodal
+9.8 difference
Gemma 4 12B
MiMo-V2.5
N/A
$null / $null
N/A
N/A
N/A
N/A
256K
1M
Pick MiMo-V2.5 if you want the stronger benchmark profile. Gemma 4 12B only becomes the better choice if coding is the priority.
MiMo-V2.5 is clearly ahead on the provisional aggregate, 72 to 53. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
MiMo-V2.5's sharpest advantage is in multimodal & grounded, where it averages 78.9 against 69.1. The single biggest benchmark swing on the page is MMMU-Pro, 69.1% to 77.9%. Gemma 4 12B does hit back in coding, so the answer changes if that is the part of the workload you care about most.
MiMo-V2.5 gives you the larger context window at 1M, compared with 256K for Gemma 4 12B.
MiMo-V2.5 is ahead on BenchLM's provisional leaderboard, 72 to 53. The biggest single separator in this matchup is MMMU-Pro, where the scores are 69.1% and 77.9%.
Gemma 4 12B has the edge for coding in this comparison, averaging 72 versus 56.1. MiMo-V2.5 stays close enough that the answer can still flip depending on your workload.
MiMo-V2.5 has the edge for multimodal and grounded tasks in this comparison, averaging 78.9 versus 69.1. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
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