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

https://www.slideserve.com/aaron_ward92/how-do-i-delete-grok-chat-history-on-grok-com

To delete your Grok chat history on grok.com/app and X, go to your chat settings and choose clear history. Remember this moves items to Recently Deleted, where they stay for 30 days before final removal