🌗 我們如何訓練一個小型大型語言模型(LLM)刪減 68% 的 RAG 上下文➤ 透過「列表式評估」精準刪減,在成本與準確度間取得最佳平衡✤ https://www.kapa.ai/blog/how-we-prune-rag-context在處理大規模技術文件與複雜知識庫時,RAG(檢索增強生成)系統常面臨「檢索過多無效資訊」導致成本高昂且幹擾模型判斷的問題。Kapa.ai 團隊通過在檢索器(Retriever)與生成器(Generator)之間加入一個輕量級的「篩選模型(Pruner)」,成功解決此挑戰。這個小型 LLM 能同時閱讀問題與所有檢索到的片段,按重要性分級篩選,在維持 96% 檢索召回率的同時,剔除 68% 的多餘上下文,將整體查詢成本降低了三分之一。+ 這是一個非常實用的工程實踐!很多人都在追求提高召回率,卻忽略了冗餘內容對生成模型帶來的隱形成本,以及過多資訊造成的注意力分散。+ 「相關性不是單一片段的屬性」這一點點出痛點了,很多時候片段之間存在邏輯依賴,單純看排序分數(Rerank sc#人工智慧 #檢索增強生成 (RAG) #LLM 優化 #成本控制
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