Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemma 4 12B
53
Grok 4.20
72
Pick Grok 4.20 if you want the stronger benchmark profile. Gemma 4 12B only becomes the better choice if coding is the priority.
Coding
+11.0 difference
Reasoning
+9.9 difference
Multimodal
+1.7 difference
Gemma 4 12B
Grok 4.20
N/A
$2 / $6
N/A
233 t/s
N/A
10.33s
256K
2M
Pick Grok 4.20 if you want the stronger benchmark profile. Gemma 4 12B only becomes the better choice if coding is the priority.
Grok 4.20 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.
Grok 4.20's sharpest advantage is in reasoning, where it averages 53.3 against 43.4. The single biggest benchmark swing on the page is MMMU-Pro, 69.1% to 75.2%. Gemma 4 12B does hit back in coding, so the answer changes if that is the part of the workload you care about most.
Grok 4.20 gives you the larger context window at 2M, compared with 256K for Gemma 4 12B.
Grok 4.20 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 75.2%.
Gemma 4 12B has the edge for coding in this comparison, averaging 72 versus 61. Grok 4.20 stays close enough that the answer can still flip depending on your workload.
Grok 4.20 has the edge for reasoning in this comparison, averaging 53.3 versus 43.4. Gemma 4 12B stays close enough that the answer can still flip depending on your workload.
Grok 4.20 has the edge for multimodal and grounded tasks in this comparison, averaging 70.8 versus 69.1. Inside this category, MedXpertQA (MM) is the benchmark that creates the most daylight between them.
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