Claude Instant 1.2 and DeepSeek V3 Chat don't publish scores on any of the same benchmarks, so there's no direct head-to-head comparison. Claude Instant 1.2 shipped 480 days before DeepSeek V3 Chat, so benchmark comparisons should account for the intervening progress.

Claude Instant 1.2 is proprietary, while DeepSeek V3 Chat is open weight.

Direct benchmark comparisons are unavailable — Claude Instant 1.2 and DeepSeek V3 Chat don't publish scores on any of the same benchmarks.