GPT in Excel errors
This article addresses the most common problems that can be encountered while using GPT in Excel. We'll provide fixes and guidance for troubleshooting everything from common typos to credit issues.
Invalid prompt parameter
Error: Invalid prompt parameter.
Problem: Your prompt is not recognized by OpenAI.
Check that you have quotation marks around your prompt if it is not in a cell:
✅
=GPT("hello")
✅
=GPT(A1)
❌ =GPT(hello)
Check that you are using the correct number format for temperature for your locale:
0.8
or0,8
?Check that your arguments are in the correct order. See the function list
Invalid Name
#NAME? Invalid Name Error. The formula contains unrecognized text.

Problem: The GPT functions aren't recognized by Excel.
- Click GPT in Excel in the Home tab to enable the GPT functions.
- If the problem persists, try activating the add-in (the experience might be slightly different for Mac users):
- Click Add-ins in the Home tab.
- Click More Add-ins.
- Select GPT in Excel in the My Add-ins tab.
- Click Add.
- Refresh the GPT formulas on error.
Error in Value
Error in Value. A value used in the formula is of the wrong data type.

Problem: Your formula can't be interpreted by OpenAI.
- Check that you are using the right parameter separator for your locale:
,
or;
? - Check that your arguments are in the correct order. See the function list
Sidebar fails to load
Error loading Add-Ins
Problem: GPT in Excel sidebar fails to load, or remain blank.
Restart Excel, create a new workbook and launch the add-in again.
No credits left
#Error: No credits left
Problem: You have reached your credit limit or your credit pack has expired after 90 days.
Click Buy credits to access the Pricing menu and buy more credits.
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