DeepSeek Chat (R1-based) and o1 don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o1 shipped 46 days before DeepSeek Chat (R1-based), so benchmark comparisons should account for the intervening progress.

DeepSeek Chat (R1-based) is open weight, while o1 is proprietary.

Direct benchmark comparisons are unavailable — DeepSeek Chat (R1-based) and o1 don't publish scores on any of the same benchmarks.