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

# AI21

To use Open Interpreter with a model from AI21, set the `model` flag:

<CodeGroup>
  ```bash Terminal theme={null}
  interpreter --model j2-light
  ```

  ```python Python theme={null}
  from interpreter import interpreter

  interpreter.llm.model = "j2-light"
  interpreter.chat()
  ```
</CodeGroup>

# Supported Models

We support any model from [AI21:](https://www.ai21.com/)

<CodeGroup>
  ```bash Terminal theme={null}
  interpreter --model j2-light
  interpreter --model j2-mid
  interpreter --model j2-ultra
  ```

  ```python Python theme={null}
  interpreter.llm.model = "j2-light"
  interpreter.llm.model = "j2-mid"
  interpreter.llm.model = "j2-ultra"
  ```
</CodeGroup>

# Required Environment Variables

Set the following environment variables [(click here to learn how)](https://chat.openai.com/share/1062cdd8-62a1-4aa8-8ec9-eca45645971a) to use these models.

| Environment Variable | Description                                        | Where to Find                                              |
| -------------------- | -------------------------------------------------- | ---------------------------------------------------------- |
| `AI21_API_KEY`       | The API key for authenticating to AI21's services. | [AI21 Account Page](https://www.ai21.com/account/api-keys) |