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Cohere Rerank 4 Fast

Cohere Rerank 4 Fast is a multilingual reranking model from Cohere tuned for low-latency, high-throughput retrieval over English and non-English documents and semi-structured JSON.

Rerank
index.ts
import { rerank } from 'ai';


const result = await rerank({
  model: 'cohere/rerank-v4-fast',
  query: 'What is the capital of France?',
  documents: [
    'Paris is the capital of France.',
    'Berlin is the capital of Germany.',
    'Madrid is the capital of Spain.',
  ],
})
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Providers

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Provider
Context
Latency
Throughput
Input
Output
Cache
Web Search
Per Query
Capabilities
ZDR
No Training
Release Date
Cohere
Legal:Terms
•
Privacy
32K
—$2/K
12/11/2025