Kimi Linear and o4-mini-high don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o4-mini-high shipped 168 days before Kimi Linear, so benchmark comparisons should account for the intervening progress.

Kimi Linear is open weight, while o4-mini-high is proprietary.

Direct benchmark comparisons are unavailable — Kimi Linear and o4-mini-high don't publish scores on any of the same benchmarks.