> ## 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.

# Anthropic

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

<CodeGroup>
  ```bash Terminal theme={null}
  interpreter --model claude-instant-1
  ```

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

  interpreter.llm.model = "claude-instant-1"
  interpreter.chat()
  ```
</CodeGroup>

# Supported Models

We support any model from [Anthropic:](https://www.anthropic.com/)

<CodeGroup>
  ```bash Terminal theme={null}
  interpreter --model claude-instant-1
  interpreter --model claude-instant-1.2
  interpreter --model claude-2
  ```

  ```python Python theme={null}
  interpreter.llm.model = "claude-instant-1"
  interpreter.llm.model = "claude-instant-1.2"
  interpreter.llm.model = "claude-2"
  ```
</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                           |
| -------------------- | ------------------------------------------------------- | --------------------------------------- |
| `ANTHROPIC_API_KEY`  | The API key for authenticating to Anthropic's services. | [Anthropic](https://www.anthropic.com/) |