To delete your Grok chat history, go to grok.com/app and remove conversations...

https://www.pure-bookmark.win/to-delete-your-grok-chat-history-go-to-grok-com-app-or-open-the-x-app-find

To delete your Grok chat history, go to grok.com/app and remove conversations there. Then, check X (formerly Twitter) if you’ve used Grok there and delete chats separately