========== Quickstart

Installation

To install LangChain run:

.. code-block:: console

$ python -m pip install gpt-engineer

For more details, see our Installation guide.

Choose one of the following:

Export env variable (you can add this to .bashrc so that you don't have to do it each time you start the terminal)

.. code-block:: console
```
$ export OPENAI_API_KEY=[your api key]
```
Add it to the .env file:
- Create a copy of .env.template named .env
- Add your OPENAI_API_KEY in .env
If you want to use a custom model, visit our docs on using open models and azure models <./open_models.html>_.
To set API key on windows check the Windows README <./windows_readme_link.html>_.

Create an empty folder for your project anywhere on your computer
Create a file called prompt (no extension) inside your new folder and fill it with instructions
Run gpte <project_dir> with a relative path to your folder
For example, if you create a new project inside the gpt-engineer /projects directory:

.. code-block:: console

$ gpte projects/my-new-project

Locate a folder with code which you want to improve anywhere on your computer
Create a file called prompt (no extension) inside your new folder and fill it with instructions for how you want to improve the code
Run gpte <project_dir> -i with a relative path to your folder
For example, if you want to run it against an existing project inside the gpt-engineer /projects directory:

.. code-block:: console

$ gpte projects/my-old-project -i

By running gpt-engineer you agree to our terms <./terms_link.html>_.

To run in the browser you can simply: