# CohereRerank

> **Class** in `langchain_classic`

📖 [View in docs](https://reference.langchain.com/python/langchain-classic/retrievers/document_compressors/cohere_rerank/CohereRerank)

Document compressor that uses `Cohere Rerank API`.

## Signature

```python
CohereRerank()
```

## Extends

- `BaseDocumentCompressor`

## Properties

- `client`
- `top_n`
- `model`
- `cohere_api_key`
- `user_agent`
- `model_config`

## Methods

- [`validate_environment()`](https://reference.langchain.com/python/langchain-classic/retrievers/document_compressors/cohere_rerank/CohereRerank/validate_environment)
- [`rerank()`](https://reference.langchain.com/python/langchain-classic/retrievers/document_compressors/cohere_rerank/CohereRerank/rerank)
- [`compress_documents()`](https://reference.langchain.com/python/langchain-classic/retrievers/document_compressors/cohere_rerank/CohereRerank/compress_documents)

## ⚠️ Deprecated

Deprecated since version 0.0.30.

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/9f232caa7a8fe1ca042a401942d5d90d54ceb1a6/libs/langchain/langchain_classic/retrievers/document_compressors/cohere_rerank.py#L15)