We recommended using a virtual environment for your project to keep your packages contained. See venv.

Install AG2 on your machine:

pip install ag2[openai]

If you have been using autogen or pyautogen, all you need to do is upgrade it using:

pip install -U autogen[openai]

or

pip install -U pyautogen[openai]

as pyautogen, autogen, and ag2 are aliases for the same PyPI package.