DeepSeek V3.1 and Mistral Small don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mistral Small shipped 542 days before DeepSeek V3.1, so benchmark comparisons should account for the intervening progress.

DeepSeek V3.1 is open weight, while Mistral Small is proprietary.

Direct benchmark comparisons are unavailable — DeepSeek V3.1 and Mistral Small don't publish scores on any of the same benchmarks.