> ## 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.
# OpenAI
[OpenAI](https://openai.com/)'s API and models are fully supported in AG2. You will need an OpenAI account and to create an API key. [See their website for further details](https://openai.com/).
## Installation
**From version 0.8**: The OpenAI package, `openai`, is not installed by default, install it with the `openai` extra as shown below.
```bash theme={null}
pip install ag2[openai]
```
If you have been using `autogen` or `ag2`, all you need to do is upgrade it using:
```bash theme={null}
pip install -U autogen[openai]
```
or
```bash theme={null}
pip install -U ag2[openai]
```
as `autogen` and `ag2` are aliases for the same PyPI package.
## LLM Configurations
See the [LLM Configuration](/docs/user-guide/basic-concepts/llm-configuration) for further details on setting an creating an LLM configuration.
The below example of an `OAI_CONFIG_LIST` shows how the OpenAI client class is used by specifying the `api_type` as `openai`.
```python theme={null}
[
{
"api_type": "openai",
"model": "o1",
"api_key": "your OpenAI Key goes here",
},
{
"api_type": "openai",
"model": "gpt-4o-mini",
"api_key": "your OpenAI Key goes here",
},
{
"api_type": "openai",
"model": "gpt-4o-mini",
"api_key": "your OpenAI Key goes here",
}
]
```
As an alternative to the `api_key` key and value in the config, you can set the environment variable `OPENAI_API_KEY` to your OpenAI key.
Linux/Mac:
```bash theme={null}
export OPENAI_API_KEY="your_openai_api_key_here"
```
Windows:
```bash theme={null}
set OPENAI_API_KEY=your_openai_api_key_here
```
## Examples
See the [ConversableAgent example](/docs/user-guide/basic-concepts/conversable-agent) in our [Basic Concepts](/docs/user-guide/basic-concepts/installing-ag2) documentation to see OpenAI's LLMs in use.