To delete your Grok chat history on grok.com/app and X, open your chat, select...

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

To delete your Grok chat history on grok.com/app and X, open your chat, select the delete option, and confirm. Remember, deleted chats move to Recently Deleted where they stay for 30 days before permanent removal