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长上下文窗口、Agent崛起,RAG已死?
Kelly Hong 的研究则为「长上下文万能论」敲响了警钟。她提出了「上下文腐烂」现象:随着输入上下文的增长,尤其是在存在模糊信息和「干扰项」时,大模型的性能会显著下降,甚至在简单任务上也变得不可靠。这证明了精巧的上下文工程和精准的检索比简单粗暴地填充上下文窗口更为重要。
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