Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemma 4 E2B
28
GPT-5.5 Pro
100
Pick GPT-5.5 Pro if you want the stronger benchmark profile. Gemma 4 E2B only becomes the better choice if you want the cheaper token bill.
Knowledge
+3.1 difference
Gemma 4 E2B
GPT-5.5 Pro
$0 / $0
$30 / $180
N/A
N/A
N/A
N/A
128K
1M
Pick GPT-5.5 Pro if you want the stronger benchmark profile. Gemma 4 E2B only becomes the better choice if you want the cheaper token bill.
GPT-5.5 Pro is clearly ahead on the provisional aggregate, 100 to 28. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.5 Pro's sharpest advantage is in knowledge, where it averages 57.2 against 54.1.
GPT-5.5 Pro is also the more expensive model on tokens at $30.00 input / $180.00 output per 1M tokens, versus $0.00 input / $0.00 output per 1M tokens for Gemma 4 E2B. That is roughly Infinityx on output cost alone. GPT-5.5 Pro gives you the larger context window at 1M, compared with 128K for Gemma 4 E2B.
GPT-5.5 Pro is ahead on BenchLM's provisional leaderboard, 100 to 28.
GPT-5.5 Pro has the edge for knowledge tasks in this comparison, averaging 57.2 versus 54.1. Gemma 4 E2B stays close enough that the answer can still flip depending on your workload.
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