To delete your Grok chat history on grok.com/app and X, go to your chat...

https://fun-wiki.win/index.php/Does_Deleting_My_Grok_Account_Stop_Apple_or_Google_Play_Billing%3F

To delete your Grok chat history on grok.com/app and X, go to your chat settings and select “Delete History.” Remember, this only removes chat messages