Head-to-head comparison across 0benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Opus 4.5 Thinking
22
GPT-5.2-Codex
78
Benchmark data for Claude Opus 4.5 Thinking and GPT-5.2-Codex is coming soon on BenchLM.
Claude Opus 4.5 Thinking
GPT-5.2-Codex
N/A
$1.75 / $14
N/A
123 t/s
N/A
87.34s
200K
400K
Benchmark data for Claude Opus 4.5 Thinking and GPT-5.2-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-5.2-Codex has the larger context window at 400K, compared with 200K for Claude Opus 4.5 Thinking.
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 Both model pages still include creator, context window, reasoning mode, and other metadata while benchmark coverage fills in.
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