Gemini 3.1 Flash and GLM-4-9B don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. GLM-4-9B shipped 631 days before Gemini 3.1 Flash, so benchmark comparisons should account for the intervening progress.

Gemini 3.1 Flash is proprietary, while GLM-4-9B is open weight.

Direct benchmark comparisons are unavailable — Gemini 3.1 Flash and GLM-4-9B don't publish scores on any of the same benchmarks.