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

https://sierra-wiki.win/index.php/How_Do_I_Stop_Grok_from_Using_My_Chats_for_Training_on_Grok.com%3F

To delete your Grok chat history, go to grok.com/app or your X account and remove conversations directly. Remember, deleting chats does not erase files or Imagine media—you’ll need to delete those separately