Reranking with Cohere

When retrieving documents for RAG, initial vector similarity search may miss important semantic matches.

Cohere’s reranking service helps improve result relevance by reordering documents using multiple scoring factors.


import { 
  rerankWithScorer as rerank, 
  CohereRelevanceScorer 
} from "@mastra/rag";
 
const results = rerank({
  results: searchResults,
  query: "deployment configuration",
  scorer: new CohereRelevanceScorer('rerank-v3.5'),
  {
    topK: 5,
    weights: {
      semantic: 0.4,
      vector: 0.4,
      position: 0.2,
    },
  },
);

Reranking with Cohere

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