To delete your Grok chat history on grok.com/app and X, go to your chat...
https://romeo-wiki.win/index.php/Can_I_Delete_a_Single_Grok_Chat_on_X_or_Only_Everything%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 messages—you’ll need to delete files and Imagine media separately in their own sections