Head-to-head comparison across 0benchmark categories. Overall scores shown here use BenchLM's provisional ranking lane.
Claude Opus 4.5
77
GPT-5.1-Codex
18
Verified leaderboard positions: Claude Opus 4.5 #9 · GPT-5.1-Codex unranked
Benchmark data for Claude Opus 4.5 and GPT-5.1-Codex is coming soon on BenchLM.
Claude Opus 4.5
GPT-5.1-Codex
$5 / $25
N/A
46 t/s
N/A
1.01s
N/A
200K
400K
Benchmark data for Claude Opus 4.5 and GPT-5.1-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-5.1-Codex has the larger context window at 400K, compared with 200K for Claude Opus 4.5.
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.
Claude Opus 4.5: $5.00 input / $25.00 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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