Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemma 4 26B A4B
58
GPT-5.5 Pro
100
Pick GPT-5.5 Pro if you want the stronger benchmark profile. Gemma 4 26B A4B only becomes the better choice if you want the cheaper token bill.
Knowledge
+8.0 difference
Gemma 4 26B A4B
GPT-5.5 Pro
$0 / $0
$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 26B A4B 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 58. 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 49.2. The single biggest benchmark swing on the page is HLE, 17.2% to 57.2%.
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 26B A4B. That is roughly Infinityx on output cost alone. GPT-5.5 Pro gives you the larger context window at 1M, compared with 256K for Gemma 4 26B A4B.
GPT-5.5 Pro is ahead on BenchLM's provisional leaderboard, 100 to 58. The biggest single separator in this matchup is HLE, where the scores are 17.2% and 57.2%.
GPT-5.5 Pro has the edge for knowledge tasks in this comparison, averaging 57.2 versus 49.2. Inside this category, HLE is the benchmark that creates the most daylight between them.
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