Composer and Kimi Linear don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Kimi Linear shipped 28 days before Composer, so benchmark comparisons should account for the intervening progress.

Composer is proprietary, while Kimi Linear is open weight.

Direct benchmark comparisons are unavailable — Composer and Kimi Linear don't publish scores on any of the same benchmarks.