Head-to-head comparison across 2benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemma 4 26B A4B
56
GPT-5.4 Pro
91
Pick GPT-5.4 Pro if you want the stronger benchmark profile. Gemma 4 26B A4B only becomes the better choice if knowledge is the priority or you want the cheaper token bill.
Knowledge
+0.2 difference
Multimodal
+20.2 difference
Gemma 4 26B A4B
GPT-5.4 Pro
$0 / $0
$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 26B A4B only becomes the better choice if knowledge is the priority or you want the cheaper token bill.
GPT-5.4 Pro is clearly ahead on the provisional aggregate, 91 to 56. 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 multimodal & grounded, where it averages 94 against 73.8. The single biggest benchmark swing on the page is HLE, 17.2% to 58.7%. Gemma 4 26B A4B 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 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-5.4 Pro gives you the larger context window at 1.05M, compared with 256K for Gemma 4 26B A4B.
GPT-5.4 Pro is ahead on BenchLM's provisional leaderboard, 91 to 56. The biggest single separator in this matchup is HLE, where the scores are 17.2% and 58.7%.
Gemma 4 26B A4B has the edge for knowledge tasks in this comparison, averaging 49.2 versus 49. Inside this category, HLE is the benchmark that creates the most daylight between them.
GPT-5.4 Pro has the edge for multimodal and grounded tasks in this comparison, averaging 94 versus 73.8. Inside this category, MMMU-Pro is the benchmark that creates the most daylight between them.
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