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

https://www.protopage.com/keith.barker12#Bookmarks

To delete your Grok chat history on grok.com/app and X, go to the chat settings and choose ‘Delete Conversation.’ Remember, this only removes text chats. Any files or Imagine media must be deleted separately from their respective sections