Grok 4 Heavy 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 614 days before Grok 4 Heavy, so benchmark comparisons should account for the intervening progress.

Grok 4 Heavy is proprietary, while Grok‑1 is open weight.

Direct benchmark comparisons are unavailable — Grok 4 Heavy and Grok‑1 don't publish scores on any of the same benchmarks.