DeepSeek V3.1 Terminus and o4-mini-high don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. o4-mini-high shipped 159 days before DeepSeek V3.1 Terminus, so benchmark comparisons should account for the intervening progress.

DeepSeek V3.1 Terminus is open weight, while o4-mini-high is proprietary.

Direct benchmark comparisons are unavailable — DeepSeek V3.1 Terminus and o4-mini-high don't publish scores on any of the same benchmarks.