Rerank

import { createRerankedRetriever, cohereReranker } from '@agentskit/rag'

const retriever = createRerankedRetriever({
  retriever: rag,
  rerank: cohereReranker({ apiKey: process.env.COHERE_API_KEY! }),
  topN: 5,
})

#Rerankers

• cohereReranker({ apiKey, model? }) — Cohere Rerank.
• bgeReranker({ url, model? }) — self-hosted BGE cross-encoder.
• voyageReranker({ apiKey, model? }) — Voyage AI; defaults to rerank-2. Pass rerank-2-lite for cheaper / faster runs.
• jinaReranker({ apiKey, model? }) — Jina AI; defaults to jina-reranker-v2-base-multilingual.
• bm25Rerank — zero-dep fallback.

All rerankers are drop-in RerankFn values — they share the same createRerankedRetriever API so you can swap them without changing call sites.

#Related

• Hybrid · Recipe: RAG reranking