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Copy file name to clipboardExpand all lines: docs/reference/reranking/index.asciidoc
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Many search systems are built on multi-stage retrieval pipelines.
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Earlier stages uses cheap, fast algorithms to find a broad set of possible matches.
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Earlier stages use cheap, fast algorithms to find a broad set of possible matches.
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Later stages uses a more powerful model, often machine learning-based, to reorder the documents.
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Later stages use more powerful models, often machine learning-based, to reorder the documents.
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This step is called re-ranking.
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Because the resource-intensive model is only applied to the smaller set of pre-filtered results, this approach returns more relevant results while still optimizing for search performance and computational costs.
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