o3-mini 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 455 days before o3-mini, so benchmark comparisons should account for the intervening progress.

o3-mini is proprietary, while Grok‑1 is open weight.

Direct benchmark comparisons are unavailable — o3-mini and Grok‑1 don't publish scores on any of the same benchmarks.