Mistral Small 3 and o1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o1 shipped 27 days before Mistral Small 3, so benchmark comparisons should account for the intervening progress.

Mistral Small 3 is open weight, while o1 is proprietary.

Direct benchmark comparisons are unavailable — Mistral Small 3 and o1 don't publish scores on any of the same benchmarks.