Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemma 4 12B
53
GPT-5.3 Codex
86
Pick GPT-5.3 Codex if you want the stronger benchmark profile. Gemma 4 12B only becomes the better choice if coding is the priority.
Coding
+8.9 difference
Gemma 4 12B
GPT-5.3 Codex
N/A
$1.75 / $14
N/A
79 t/s
N/A
88.26s
256K
400K
Pick GPT-5.3 Codex if you want the stronger benchmark profile. Gemma 4 12B only becomes the better choice if coding is the priority.
GPT-5.3 Codex is clearly ahead on the provisional aggregate, 86 to 53. The gap is large enough that you do not need to squint at the spreadsheet to see the difference.
GPT-5.3 Codex gives you the larger context window at 400K, compared with 256K for Gemma 4 12B.
GPT-5.3 Codex is ahead on BenchLM's provisional leaderboard, 86 to 53.
Gemma 4 12B has the edge for coding in this comparison, averaging 72 versus 63.1. GPT-5.3 Codex stays close enough that the answer can still flip depending on your workload.
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