DeepSeek V3 Chat and Gemini 1.5 Flash don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Gemini 1.5 Flash shipped 201 days before DeepSeek V3 Chat, so benchmark comparisons should account for the intervening progress.

DeepSeek V3 Chat is open weight, while Gemini 1.5 Flash is proprietary.

Direct benchmark comparisons are unavailable — DeepSeek V3 Chat and Gemini 1.5 Flash don't publish scores on any of the same benchmarks.