Grok 4.6 hits 95% on GPQA Diamond, tied #1 and beating Opus 5 and GPT-5.6

XFreeze · x · 2026-08-28

xAI's Grok 4.6 (high) scores 95% on the GPQA Diamond leaderboard, tied for #1 with the highest score on the chart for graduate-level scientific reasoning. It outperforms Claude Opus 5, Fable 5 and GPT-5.6 Sol. GPQA Diamond tests models with science questions even experts find tough, putting Grok at the frontier of scientific reasoning.

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