How to connect ChatGPT to Microsoft Word
You can connect ChatGPT to Microsoft Word with the GPT for Excel Word add-in:
Step 1: Install the GPT for Excel Word add-in
Install from the Microsoft AppSource marketplace: Office store link
Step 2: Open GPT for Excel Word
Click GPT for Excel Word from the ribbon's Home tab.
Step 3: Use ChatGPT in Microsoft Word
ChatGPT is now connected to Microsoft Word, you can use ask it anything via the sidebar, using the model you want (including gpt-4o, gpt-5, and gpt-4.1), with or without an API key.