Mistral Medium and Kimi-Dev don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Mistral Medium shipped 548 days before Kimi-Dev, so benchmark comparisons should account for the intervening progress.

Mistral Medium is proprietary, while Kimi-Dev is open weight.

Direct benchmark comparisons are unavailable — Mistral Medium and Kimi-Dev don't publish scores on any of the same benchmarks.