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

https://online-wiki.win/index.php/Grok_Delete_All_Conversations_is_Missing_on_My_Account_%E2%80%93_What_Now%3F

To delete your Grok chat history, go to grok.com/app and remove conversations manually. On X, clear your chat threads there too. Remember, files and Imagine media don’t delete automatically—they need to be removed separately