DeepSeek V2.5 and Gemini 3.5 Flash Cyber don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek V2.5 shipped 684 days before Gemini 3.5 Flash Cyber, so benchmark comparisons should account for the intervening progress.

DeepSeek V2.5 is open weight, while Gemini 3.5 Flash Cyber is proprietary.

Direct benchmark comparisons are unavailable — DeepSeek V2.5 and Gemini 3.5 Flash Cyber don't publish scores on any of the same benchmarks.