Rerank 4 Pro
Rerank 4 Pro is the quality-focused tier of Cohere's previous reranking generation. It supports multilingual search and semi-structured content such as records and tables.
Model behavior
Compared with Rerank 3.5, the v4 family has a larger context window and separate quality and throughput tiers. It can be used after an existing retrieval step.Oracle documentation for Cohere Rerank 4
How to use it well
Practical guidance. This model remains useful as a reference for an established search application. Compare v4 and v5 on difficult cases with nearby but incorrect answers. Keep document serialization and candidate ordering consistent during that review. If the application needs passage-level evidence, assess the newer Context Focus workflow separately instead of treating a ranking score as a passage citation.
Specifications & access
| Detail | Value and conditions |
|---|---|
| Access | API |
| Model identifiers | rerank-v4.0-pro |
| Context window | 32,768 tokens Query and document share the context; reserved tokens also consume space. Rerank context, truncation and input guidance |
| Generation | Previous generation; still listedCohere model catalog |
Related models
- Rerank 5 Pro
Cohere · Rerank
Quality-focused search reranker with Context Focus for returning relevant document passages.
Launch date not confirmedAPI - Rerank 4 Fast
Cohere · Rerank
Throughput-focused multilingual document reranker in the Rerank 4 family.
Launch date not confirmedAPI