Mistral Small 3.2 and o3-mini don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o3-mini shipped 140 days before Mistral Small 3.2, so benchmark comparisons should account for the intervening progress.

Mistral Small 3.2 is open weight, while o3-mini is proprietary.

Direct benchmark comparisons are unavailable — Mistral Small 3.2 and o3-mini don't publish scores on any of the same benchmarks.