> ## Documentation Index
> Fetch the complete documentation index at: https://docs.openhands.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# OpenAI

> OpenHands uses LiteLLM to make calls to OpenAI's chat models. You can find their documentation on using OpenAI as a provider [here](https://docs.litellm.ai/docs/providers/openai).

## Configuration

When running OpenHands, you'll need to set the following in the OpenHands UI through the Settings under the `LLM` tab:

* `LLM Provider` to `OpenAI`
* `LLM Model` to the model you will be using.
  [Visit here to see a full list of OpenAI models that LiteLLM supports.](https://docs.litellm.ai/docs/providers/openai#openai-chat-completion-models)
  If the model is not in the list, enable `Advanced` options, and enter it in `Custom Model` (e.g. openai/\<model-name> like `openai/gpt-4o`).
* `API Key` to your OpenAI API key. To find or create your OpenAI Project API Key, [see here](https://platform.openai.com/api-keys).

## Using OpenAI-Compatible Endpoints

Just as for OpenAI Chat completions, we use LiteLLM for OpenAI-compatible endpoints. You can find their full documentation on this topic [here](https://docs.litellm.ai/docs/providers/openai_compatible).

## Using an OpenAI Proxy

If you're using an OpenAI proxy, in the OpenHands UI through the Settings under the `LLM` tab:

1. Enable `Advanced` options
2. Set the following:
   * `Custom Model` to openai/\<model-name> (e.g. `openai/gpt-4o` or openai/\<proxy-prefix>/\<model-name>)
   * `Base URL` to the URL of your OpenAI proxy
   * `API Key` to your OpenAI API key