Gemma 4 and Grok‑2 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Grok‑2 shipped 596 days before Gemma 4, so benchmark comparisons should account for the intervening progress.

Gemma 4 is open weight, while Grok‑2 is proprietary.

Direct benchmark comparisons are unavailable — Gemma 4 and Grok‑2 don't publish scores on any of the same benchmarks.