Verdict
GPT-5.6 Sol leads 12–0 across 12 shared benchmarks.
GPT-5.6 Sol 12 · Kimi K2.6 0 · higher isn't always better — check the caveats below.
Reported scores — protocols may differ. How we compare
Unknown: GPT-5.6 Sol leads 3–0 across 3 shared unknown benchmarks (largest gap: ProofBench, 83 vs 16 — single evaluator).
Math: GPT-5.6 Sol leads 2–0 across 2 shared math benchmarks (largest gap: FrontierMath-Tier-4-v2-Private, 82.93 vs 25.64 — single evaluator).
Reasoning: GPT-5.6 Sol leads 2–0 across 2 shared reasoning benchmarks (largest gap: SimpleQA Verified, 71.6 vs 38.7 — single evaluator).
GPT-5.6 Sol leads 12–0 across 12 shared benchmarks. GPT-5.6 Sol leads 12 benchmarks and Kimi K2.6 leads 0. Higher isn't always better — see the integrity caveats on each benchmark.
GPT-5.6 Sol and Kimi K2.6 have 12 benchmarks in common in our data — those are the only rows where a direct, apples-to-apples comparison is drawn.
GPT-5.6 Sol leads unknown 3–0. GPT-5.6 Sol leads math 2–0.