# is_basemodel

> **Function** in `langsmith`

📖 [View in docs](https://reference.langchain.com/python/langsmith/_openapi_client/_models/is_basemodel)

Returns whether or not the given type is either a `BaseModel` or a union of `BaseModel`

## Signature

```python
is_basemodel(
    type_: type,
) -> bool
```

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[View source on GitHub](https://github.com/langchain-ai/langsmith-sdk/blob/d6cd6082f09e7826a2d6afe444ae6119e61b82a6/python/langsmith/_openapi_client/_models.py#L511)