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

https://technivorz.com/what-pages-do-i-need-to-visit-to-delete-everything-tied-to-grok/

To delete your Grok chat history, go to grok.com/app and clear conversations there. On X, remove any chats separately. Remember, files and Imagine media don’t delete with chat history—you’ll need to remove those on their own