← Glossary
Reranking
A second pass that re-scores retrieved results before they're used, to improve relevance.
An initial retrieval step often returns more candidates than needed, ranked by a fast but rough similarity measure. A reranking step re-scores that shortlist with a more precise (and more expensive) model, pushing the truly most relevant passages to the top before they're handed to the LLM to answer from.
Where this shows up in practice
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