# LLMManagerMixin

> **Class** in `langchain_core`

📖 [View in docs](https://reference.langchain.com/python/langchain-core/callbacks/base/LLMManagerMixin)

Mixin for LLM callbacks.

## Signature

```python
LLMManagerMixin()
```

## Methods

- [`on_llm_new_token()`](https://reference.langchain.com/python/langchain-core/callbacks/base/LLMManagerMixin/on_llm_new_token)
- [`on_llm_end()`](https://reference.langchain.com/python/langchain-core/callbacks/base/LLMManagerMixin/on_llm_end)
- [`on_llm_error()`](https://reference.langchain.com/python/langchain-core/callbacks/base/LLMManagerMixin/on_llm_error)

---

[View source on GitHub](https://github.com/langchain-ai/langchain/blob/f0c5a28fa05adcda89aebcb449d897245ab21fa4/libs/core/langchain_core/callbacks/base.py#L61)