Head-to-head comparison across 3benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemma 4 12B
53
GPT-5.4 Pro
91
Pick GPT-5.4 Pro if you want the stronger benchmark profile. Gemma 4 12B only becomes the better choice if knowledge is the priority.
Reasoning
+39.9 difference
Knowledge
+28.8 difference
Multimodal
+24.9 difference
Gemma 4 12B
GPT-5.4 Pro
N/A
$30 / $180
N/A
74 t/s
N/A
151.79s
256K
1.05M
Pick GPT-5.4 Pro if you want the stronger benchmark profile. Gemma 4 12B only becomes the better choice if knowledge is the priority.
GPT-5.4 Pro is clearly ahead on the provisional aggregate, 91 to 53. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.4 Pro's sharpest advantage is in reasoning, where it averages 83.3 against 43.4. The single biggest benchmark swing on the page is MMMU-Pro, 69.1% to 94%. Gemma 4 12B does hit back in knowledge, so the answer changes if that is the part of the workload you care about most.
GPT-5.4 Pro gives you the larger context window at 1.05M, compared with 256K for Gemma 4 12B.
GPT-5.4 Pro is ahead on BenchLM's provisional leaderboard, 91 to 53. The biggest single separator in this matchup is MMMU-Pro, where the scores are 69.1% and 94%.
Gemma 4 12B has the edge for knowledge tasks in this comparison, averaging 77.8 versus 49. Inside this category, HLE w/o tools is the benchmark that creates the most daylight between them.
GPT-5.4 Pro has the edge for reasoning in this comparison, averaging 83.3 versus 43.4. Gemma 4 12B stays close enough that the answer can still flip depending on your workload.
GPT-5.4 Pro has the edge for multimodal and grounded tasks in this comparison, averaging 94 versus 69.1. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
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