Gemini 1.5 Flash and Gemma 3 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Gemini 1.5 Flash shipped 302 days before Gemma 3, so benchmark comparisons should account for the intervening progress.

Gemini 1.5 Flash is proprietary, while Gemma 3 is open weight.

Direct benchmark comparisons are unavailable — Gemini 1.5 Flash and Gemma 3 don't publish scores on any of the same benchmarks.