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

https://echo-wiki.win/index.php/Why_Did_a_Deleted_Grok_Chat_Reappear_on_My_Other_Device%3F

To delete your Grok chat history, go to grok.com/app or X and remove messages directly. Remember, files and Imagine media don’t delete automatically and need to be cleared separately