Verdict
Claude Opus 4.1 leads 6–5 across 11 shared benchmarks.
Claude Opus 4.1 6 · Grok 4 5 · higher isn't always better — check the caveats below.
Reported scores — protocols may differ. How we compare
Reasoning: Grok 4 leads 2–1 across 3 shared reasoning benchmarks (largest gap: GPQA diamond, 82.67 vs 69.7 — single evaluator).
Claude Opus 4.1 leads 6–5 across 11 shared benchmarks. Claude Opus 4.1 leads 6 benchmarks and Grok 4 leads 5. Higher isn't always better — see the integrity caveats on each benchmark.
Claude Opus 4.1 and Grok 4 have 11 benchmarks in common in our data — those are the only rows where a direct, apples-to-apples comparison is drawn.
Grok 4 leads reasoning 2–1.