# LLMEvalChain

> **Class** in `langchain_classic`

📖 [View in docs](https://reference.langchain.com/python/langchain-classic/evaluation/schema/LLMEvalChain)

A base class for evaluators that use an LLM.

## Signature

```python
LLMEvalChain()
```

## Extends

- `Chain`

## Methods

- [`from_llm()`](https://reference.langchain.com/python/langchain-classic/evaluation/schema/LLMEvalChain/from_llm)

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/185119f98e6286253a2326d7cf4f59592678023d/libs/langchain/langchain_classic/evaluation/schema.py#L75)