Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemma 4 12B
53
GPT-5.5 Pro
100
Pick GPT-5.5 Pro if you want the stronger benchmark profile. Gemma 4 12B only becomes the better choice if knowledge is the priority.
Knowledge
+20.6 difference
Gemma 4 12B
GPT-5.5 Pro
N/A
$30 / $180
N/A
N/A
N/A
N/A
256K
1M
Pick GPT-5.5 Pro if you want the stronger benchmark profile. Gemma 4 12B only becomes the better choice if knowledge is the priority.
GPT-5.5 Pro is clearly ahead on the provisional aggregate, 100 to 53. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5 Pro gives you the larger context window at 1M, compared with 256K for Gemma 4 12B.
GPT-5.5 Pro is ahead on BenchLM's provisional leaderboard, 100 to 53.
Gemma 4 12B has the edge for knowledge tasks in this comparison, averaging 77.8 versus 57.2. Inside this category, HLE w/o tools is the benchmark that creates the most daylight between them.
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