> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ag2.ai/llms.txt
> Use this file to discover all available pages before exploring further.
# Installing AG2
AG2 is available on PyPI as `ag2`. You can install it using `pip`, the Python package manager.
We recommend using a virtual environment for your project to keep your packages contained. See venv.
Run the following command to install AG2:
```bash theme={null}
pip install "ag2[openai]"
```
This installs AG2 along with the `openai` package.
!!! note
**From ag2 version 0.8**: The OpenAI package, `openai` is not installed by default. You need to install it separately by adding the `openai` extra option.
### Install with Your Preferred Model Provider(s)
AG2 supports multiple AI model providers through **optional dependency groups**. Below are some examples of how to install AG2 with different model providers:
```bash theme={null}
pip install "ag2[openai]"
pip install "ag2[gemini]"
pip install "ag2[anthropic,cohere,mistral]"
```
!!! tip "MacOS Tip"
On MacOS, if you get a `no matches found:` error, it usually means you missed the double quotes enclosing the package name.
Wrap it in quotes as shown in the example and you should be fine:
```bash theme={null}
pip install "ag2[openai]"
```
### Upgrading from `autogen` or `ag2`
If you’ve been using `autogen` or `ag2`, upgrading is simple — no need to reinstall from scratch. `autogen` and `ag2` are aliases for the same PyPI package.
👉 To upgrade, run:
```bash theme={null}
pip install -U "autogen[openai]"
```
or
```bash theme={null}
pip install -U "ag2[openai]"
```