VoyageAI by MongoDB · Rerank model

rerank-2.5

voyageai/rerank-2.5

Rerank

Released Jul 27, 2026

rerank-2.5 is a cutting-edge reranker optimized for quality, delivering a 7.94% improvement in retrieval accuracy over Cohere Rerank v3.5 across 93 datasets. It also outperformed Cohere Rerank v3.5 by 12.70%...

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":"voyageai/rerank-2.5","query":"best espresso machine","documents":["brass lever espresso machine","a bicycle","coffee grinder"],"top_n":2}'