Verdict
GPT-5.2 leads 12–2 across 14 shared benchmarks.
Claude Opus 4.1 2 · GPT-5.2 12 · higher isn't always better — check the caveats below.
Reported scores — protocols may differ. How we compare
Reasoning: GPT-5.2 leads 3–2 across 5 shared reasoning benchmarks (largest gap: GPQA diamond, 88.53 vs 69.7 — single evaluator).
Math: GPT-5.2 leads 2–0 across 2 shared math benchmarks (largest gap: FrontierMath-Tier-4-v2-Private, 31.7 vs 2.44 — single evaluator).
GPT-5.2 leads 12–2 across 14 shared benchmarks. Claude Opus 4.1 leads 2 benchmarks and GPT-5.2 leads 12. Higher isn't always better — see the integrity caveats on each benchmark.
Claude Opus 4.1 and GPT-5.2 have 14 benchmarks in common in our data — those are the only rows where a direct, apples-to-apples comparison is drawn.
GPT-5.2 leads math 2–0. GPT-5.2 leads reasoning 3–2.