# fakeModel

> **Function** in `langchain`

📖 [View in docs](https://reference.langchain.com/javascript/langchain/index/fakeModel)

LangChain Testing Utilities

## Signature

```javascript
fakeModel(): FakeBuiltModel
```

## Returns

`FakeBuiltModel`

---

[View source on GitHub](https://github.com/langchain-ai/langchainjs/blob/e493ed653d734e31a8d051f78ab29b067f530e4b/libs/langchain-core/src/testing/fake_model_builder.ts#L134)