5 Reranking Techniques in RAG: From Fast Retrieval to Accurate Context

Reranking techniques improve document retrieval accuracy by considering query-document interactions more deeply than traditional methods. Techniques like Cross-Encoders, Reciprocal Rank Fusion (RRF), and ColBERT offer varying trade-offs between speed and precision, while managed APIs provide state-of-the-art reranking without operational overhead. For critical applications, using an LLM as a judge further enhances accuracy by leveraging advanced language understanding capabilities.

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