Gemini 3.1 Flash and Mistral Small 3 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mistral Small 3 shipped 421 days before Gemini 3.1 Flash, so benchmark comparisons should account for the intervening progress.

Gemini 3.1 Flash is proprietary, while Mistral Small 3 is open weight.

Direct benchmark comparisons are unavailable — Gemini 3.1 Flash and Mistral Small 3 don't publish scores on any of the same benchmarks.