DeepSeek V2.5 and o1-mini don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek V2.5 shipped 11 days before o1-mini, so benchmark comparisons should account for the intervening progress.

DeepSeek V2.5 is open weight, while o1-mini is proprietary.

Direct benchmark comparisons are unavailable — DeepSeek V2.5 and o1-mini don't publish scores on any of the same benchmarks.