Gemini 3.1 Flash and Codestral Mamba 7B don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Codestral Mamba 7B shipped 590 days before Gemini 3.1 Flash, so benchmark comparisons should account for the intervening progress.

Gemini 3.1 Flash is proprietary, while Codestral Mamba 7B is open weight.

Direct benchmark comparisons are unavailable — Gemini 3.1 Flash and Codestral Mamba 7B don't publish scores on any of the same benchmarks.