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

https://www.blaze-bookmarks.win/to-delete-your-grok-chat-history-go-to-grok-com-app-and-clear-conversations

To delete your Grok chat history on grok.com/app or X, go to your chat settings and choose Delete History. Remember, deleting chat doesn’t remove files or Imagine media—you’ll need to delete those separately