Head-to-head comparison across 0benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Gemini 3.1 Pro
93
GPT-5.3 Codex
89
Benchmark data for Gemini 3.1 Pro and GPT-5.3 Codex is coming soon on BenchLM.
Gemini 3.1 Pro
GPT-5.3 Codex
$1.25 / $5
$2.5 / $10
109 t/s
79 t/s
29.71s
88.26s
1M
400K
Benchmark data for Gemini 3.1 Pro and GPT-5.3 Codex is coming soon on BenchLM.
BenchLM has partial data for these models, but not enough overlapping benchmark coverage to produce a fair score-level comparison yet.
GPT-5.3 Codex is priced at $2.50 input / $10.00 output per 1M tokens, versus $1.25 input / $5.00 output per 1M tokens for Gemini 3.1 Pro. Gemini 3.1 Pro has the larger context window at 1M, compared with 400K for GPT-5.3 Codex.
Not fully yet. BenchLM is tracking both models, but the sourced benchmark breakdown for this comparison is still coming soon.
BenchLM only shows category winners and benchmark-level calls when we have sourced results that can be compared fairly. For these models, the public benchmark coverage is not complete enough yet.
Gemini 3.1 Pro: $1.25 input / $5.00 output per 1M tokens GPT-5.3 Codex: $2.50 input / $10.00 output per 1M tokens Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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