Mistral Small 3.1 and Grok Code Fast 1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mistral Small 3.1 shipped 164 days before Grok Code Fast 1, so benchmark comparisons should account for the intervening progress.

Mistral Small 3.1 is open weight, while Grok Code Fast 1 is proprietary.

Direct benchmark comparisons are unavailable — Mistral Small 3.1 and Grok Code Fast 1 don't publish scores on any of the same benchmarks.