Gemini 3.1 Flash 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 148 days before Gemini 3.1 Flash, so benchmark comparisons should account for the intervening progress.

Gemini 3.1 Flash is proprietary, while Kimi Linear is open weight.

Direct benchmark comparisons are unavailable — Gemini 3.1 Flash and Kimi Linear don't publish scores on any of the same benchmarks.