Head-to-head comparison across 1benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemini 3 Pro Deep Think
86
GPT-5.2
83
Pick Gemini 3 Pro Deep Think if you want the stronger benchmark profile. GPT-5.2 only becomes the better choice if reasoning is the priority.
Reasoning
+7.8 difference
Gemini 3 Pro Deep Think
GPT-5.2
$null / $null
$2 / $8
N/A
73 t/s
N/A
130.34s
2M
400K
Pick Gemini 3 Pro Deep Think if you want the stronger benchmark profile. GPT-5.2 only becomes the better choice if reasoning is the priority.
Gemini 3 Pro Deep Think has the cleaner provisional overall profile here, landing at 86 versus 83. It is a real lead, but still close enough that category-level strengths matter more than the headline number.
Gemini 3 Pro Deep Think gives you the larger context window at 2M, compared with 400K for GPT-5.2.
Gemini 3 Pro Deep Think is ahead on BenchLM's provisional leaderboard, 86 to 83. The biggest single separator in this matchup is ARC-AGI-2, where the scores are 45.1% and 52.9%.
GPT-5.2 has the edge for reasoning in this comparison, averaging 52.9 versus 45.1. Inside this category, ARC-AGI-2 is the benchmark that creates the most daylight between them.
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