Verdict
GPT-5.6 Sol leads 11–3 across 14 shared benchmarks.
GPT-5.6 Sol 11 · Grok 4.6 3 · higher isn't always better — check the caveats below.
Reported scores — protocols may differ. How we compare
Reasoning: GPT-5.6 Sol leads 2–1 across 3 shared reasoning benchmarks (largest gap: SimpleQA Verified, 71.6 vs 54.4 — single evaluator).
Coding: Evenly split 1–1 across 2 shared coding benchmarks (largest gap: DeepSWE, 72.67 vs 67.48 — 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 31.71 — single evaluator).
Unknown: GPT-5.6 Sol leads 2–0 across 2 shared unknown benchmarks (largest gap: ProofBench, 83 vs 51 — single evaluator).
GPT-5.6 Sol leads 11–3 across 14 shared benchmarks. GPT-5.6 Sol leads 11 benchmarks and Grok 4.6 leads 3. Higher isn't always better — see the integrity caveats on each benchmark.
GPT-5.6 Sol and Grok 4.6 have 14 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 math 2–0. GPT-5.6 Sol leads unknown 2–0.