Cohere · Rerank model

Rerank v3.5

cohere/rerank-v3.5

Rerank

Released Apr 5, 2026

Rerank v3.5 is designed to reorder search results for improved relevance. It supports multi-aspect and semi-structured data reranking over 100+ languages. Ideal for refining results from semantic or keyword search...

Specifications

Input: one query and up to 1,000 documents
Output: relevance score per document, sorted; top_n to keep the best
Billing: per token across all query–document pairs

Use it

POST /api/v1/rerank · MCP rerank · full reference

curl https://omnirail.org/api/v1/rerank \
  -H "Authorization: Bearer $OMNIRAIL_KEY" -H "Content-Type: application/json" \
  -d '{"model":"cohere/rerank-v3.5","query":"best espresso machine","documents":["brass lever espresso machine","a bicycle","coffee grinder"],"top_n":2}'