# RunInfo

> **Class** in `langchain_core`

📖 [View in docs](https://reference.langchain.com/python/langchain-core/outputs/run_info/RunInfo)

Class that contains metadata for a single execution of a chain or model.

Defined for backwards compatibility with older versions of `langchain_core`.

!!! warning "This model will likely be deprecated in the future."

Users can acquire the `run_id` information from callbacks or via `run_id`
information present in the `astream_event` API (depending on the use case).

## Signature

```python
RunInfo()
```

## Extends

- `BaseModel`

## Properties

- `run_id`

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[View source on GitHub](https://github.com/langchain-ai/langchain/blob/9f232caa7a8fe1ca042a401942d5d90d54ceb1a6/libs/core/langchain_core/outputs/run_info.py#L10)