Seed 团队预印本报告 DeepSeek V4 与 V4.1-Flash 存在相位敏感性
A Seed team preprint reports “phase sensitivity” in DeepSeek V4 and V4.1-Flash: identical information can become harder to retrieve depending on its position wi
Seed 团队的一篇预印本报告称，DeepSeek V4 和 V4.1-Flash 存在相位敏感性：同一信息在压缩 KV-cache 块中的位置不同，检索难度也会不同。该技术降低了内存与注意力开销，但长上下文检索准确率在不同位置间最多相差 40 个百分点。作者指出，平均基准分数可能掩盖这些反复出现的薄弱点，且该发现针对的是检索，而非所有已报告的模型异常。
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A Seed team preprint reports “phase sensitivity” in DeepSeek V4 and V4.1-Flash: identical information can become harder to retrieve depending on its position within compressed KV-cache blocks.
The technique cuts memory and attention costs, but long-context retrieval accuracy varied by up to 40 percentage points across positions.
Average benchmark scores can hide these recurring weak spots. The findings concern retrieval, not every reported model glitch.