Gemini 3.1 Flash 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 846 days before Gemini 3.1 Flash, so benchmark comparisons should account for the intervening progress.

Gemini 3.1 Flash is proprietary, while Grok‑1 is open weight.

Direct benchmark comparisons are unavailable — Gemini 3.1 Flash and Grok‑1 don't publish scores on any of the same benchmarks.