Kimi K2 Thinking and o3-pro don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o3-pro shipped 149 days before Kimi K2 Thinking, so benchmark comparisons should account for the intervening progress.

Kimi K2 Thinking is open weight, while o3-pro is proprietary.

Direct benchmark comparisons are unavailable — Kimi K2 Thinking and o3-pro don't publish scores on any of the same benchmarks.