Verdict
GPT-5 leads 21–3 across 24 shared benchmarks.
GPT-5 21 · o3 3 · higher isn't always better — check the caveats below.
Reported scores — protocols may differ. How we compare
Reasoning: GPT-5 leads 6–0 across 6 shared reasoning benchmarks (largest gap: GPQA diamond, 81.57 vs 75.76 — single evaluator).
Unknown: GPT-5 leads 3–1 across 4 shared unknown benchmarks (largest gap: DTBench, 84.45 vs 74.67 — single evaluator).
Math: GPT-5 leads 2–0 across 2 shared math benchmarks (largest gap: OTIS Mock AIME 2024-2025, 91.38 vs 84.43 — single evaluator).
GPT-5 leads 21–3 across 24 shared benchmarks. GPT-5 leads 21 benchmarks and o3 leads 3. Higher isn't always better — see the integrity caveats on each benchmark.
GPT-5 and o3 have 24 benchmarks in common in our data — those are the only rows where a direct, apples-to-apples comparison is drawn.
GPT-5 leads reasoning 6–0. GPT-5 leads unknown 3–1.