Prerequisites
Before you begin, make sure you have:- A Windows computer
- Your Sphinx API token
- Permission to install applications and approve a Windows User Account Control prompt
Install the Sphinx LLM Gateway
1
Download ChatGPT for Windows
Go to chatgpt.com/download and download the ChatGPT desktop app for Windows.
2
Download the Sphinx LLM Gateway installer
Open the Sphinx LLM Gateway installer in Google Drive, then click Download.
3
Run the gateway installer
Open your downloads and double-click the downloaded
.exe file.4
Allow the installer to run
If Microsoft Defender SmartScreen displays Windows protected your PC, click More info.
Confirm that the app is Codex Sphinx LLM Gateway Setup.exe, then click Run anyway.

Microsoft Defender SmartScreen warning with the More info link

Run the Codex Sphinx LLM Gateway installer
5
Complete the setup wizard
On the welcome screen, click Next.
Enter your Sphinx API token, then click Next.
When the installer is ready, click Install.
After the installation completes, click Finish.

Codex Sphinx LLM Gateway setup wizard

Enter your Sphinx API token

Install the Codex Sphinx LLM Gateway

Complete the Codex Sphinx LLM Gateway setup wizard
6
Start ChatGPT
Launch the ChatGPT desktop app and complete the introductory prompts.
7
Finish Windows setup
When ChatGPT asks for one-time permission to work on your computer, click Finish setup. In the Windows User Account Control prompt, click Yes.

Grant ChatGPT one-time permission to finish Windows setup
Verify the connection
After setup, ChatGPT opens to the main chat page. Confirm that Sphinx Gateway appears in the bottom-left corner.
ChatGPT connected to the Sphinx Gateway
You can now start a chat using the Sphinx LLM Gateway.