Head-to-head comparison across 0benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
GPT-5.2-Codex
78
o3-mini
56
Benchmark data for GPT-5.2-Codex and o3-mini is coming soon on BenchLM.
GPT-5.2-Codex
o3-mini
$1.75 / $14
$1.1 / $4.4
123 t/s
160 t/s
87.34s
7.12s
400K
200K
Benchmark data for GPT-5.2-Codex and o3-mini 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-5.2-Codex is priced at $1.75 input / $14.00 output per 1M tokens, versus $1.10 input / $4.40 output per 1M tokens for o3-mini. GPT-5.2-Codex has the larger context window at 400K, compared with 200K for o3-mini.
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.
GPT-5.2-Codex: $1.75 input / $14.00 output per 1M tokens o3-mini: $1.10 input / $4.40 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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