DeepSeek-R1-Lite Preview and o4-mini-high don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. DeepSeek-R1-Lite Preview shipped 147 days before o4-mini-high, so benchmark comparisons should account for the intervening progress.

DeepSeek-R1-Lite Preview is open weight, while o4-mini-high is proprietary.

Direct benchmark comparisons are unavailable — DeepSeek-R1-Lite Preview and o4-mini-high don't publish scores on any of the same benchmarks.