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

https://wiki-book.win/index.php/What_Should_I_Do_if_Grok_Delete_All_Doesn%E2%80%99t_Show_on_Mobile%3F

To delete your Grok chat history on grok.com/app or X, go to your messages, select the chats you want to remove, and hit delete. Remember, this only clears conversations—not files or Imagine media, which you’ll need to delete separately