Verdict
GPT-6.1 Sol leads 12–0 across 14 shared benchmarks.
GPT-5.6 Sol 0 · GPT-6.1 Sol 12 · 2 tied · higher isn't always better — check the caveats below.
Reported scores — protocols may differ. How we compare
Unknown: GPT-6.1 Sol leads 4–0 across 4 shared unknown benchmarks (largest gap: Furniture Assembly, 71.43 vs 38.1 — protocols undisclosed).
Reasoning: GPT-6.1 Sol leads 3–0 across 3 shared reasoning benchmarks (largest gap: SimpleQA Verified, 73.9 vs 69.7 — protocols undisclosed).
Math: GPT-6.1 Sol leads 1–0 across 2 shared math benchmarks (largest gap: FrontierMath-Tier-4-v2-Private, 100 vs 82.93 — protocols undisclosed).
GPT-6.1 Sol leads 12–0 across 14 shared benchmarks. GPT-5.6 Sol leads 0 benchmarks and GPT-6.1 Sol leads 12, with 2 tied. Higher isn't always better — see the integrity caveats on each benchmark.
GPT-5.6 Sol and GPT-6.1 Sol have 14 benchmarks in common in our data — those are the only rows where a direct, apples-to-apples comparison is drawn.
GPT-6.1 Sol leads unknown 4–0. GPT-6.1 Sol leads reasoning 3–0.