DeepSeek V3.1 and Magistral Small don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Magistral Small shipped 72 days before DeepSeek V3.1, so benchmark comparisons should account for the intervening progress.

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

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