> ## Documentation Index
> Fetch the complete documentation index at: https://langchain-5e9cc07a-preview-devupd-1765394015-eccef47.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# MODEL_NOT_FOUND

<Note>
  Currently only used in `langchainjs` (JavaScript/TypeScript).
</Note>

The model name you have specified is not acknowledged by your provider.

## Troubleshooting

To resolve this error:

1. **Verify the model identifier**: Double check the model string you are passing in. Ensure the spelling and format are correct
2. **Check proxy/wrapper configurations**: If you are using a proxy or other alternative host with a model wrapper, confirm that the permitted model names are not restricted or altered

The error typically stems from either a typo in the model name string itself or restrictions imposed by a proxy service or model wrapper between your code and the provider's API.

***

<Callout icon="pen-to-square" iconType="regular">
  [Edit the source of this page on GitHub.](https://github.com/langchain-ai/docs/edit/main/src/oss/langchain/errors/MODEL_NOT_FOUND.mdx)
</Callout>

<Tip icon="terminal" iconType="regular">
  [Connect these docs programmatically](/use-these-docs) to Claude, VSCode, and more via MCP for real-time answers.
</Tip>