Model · Cohere · Reranking
Cohere Rerank v4
Cohere's flagship reranker (rerank-v4.0-pro). The standard second-pass model after a vector or BM25 retrieval — 100+ languages, 32K per-doc context, bumps precision noticeably with minimal architecture changes.
- Modality
- Reranking
- License
- Proprietary (Proprietary)
- Released
- December 11, 2025
- Last verified
- June 8, 2026
- Runs locally
- No
Strengths
- Drop-in second pass — no embedding pipeline rewrite needed
- Strong multilingual reranking (100+ languages); Pro and Fast variants
- Available via AWS Bedrock for enterprise
Weaknesses
- Closed — not self-hostable
- Reranking is always a second-pass tool; needs an embedding/BM25 first pass
Try it
| Where | Type | Notes |
|---|---|---|
| Cohere API | hosted-api | API key required |
| AWS Bedrock | hosted-api | Enterprise |
Used in solutions
Official sources
- Rerank docs docs
Change log
- — Updated from Rerank v3 to rerank-v4.0-pro (released 2025-12-11). (Interim: rerank-v3.5 2024-12-02.)
- — Initial entry.
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