Gemini 1.0 Ultra and Grok‑1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok‑1 shipped 97 days before Gemini 1.0 Ultra, so benchmark comparisons should account for the intervening progress.

Gemini 1.0 Ultra is proprietary, while Grok‑1 is open weight.

Direct benchmark comparisons are unavailable — Gemini 1.0 Ultra and Grok‑1 don't publish scores on any of the same benchmarks.