Magistral Medium and Kimi-Dev don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Kimi-Dev shipped 9 days before Magistral Medium, so benchmark comparisons should account for the intervening progress.

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

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