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

https://zaneznae304.lucialpiazzale.com/how-do-i-cancel-a-grok-subscription-after-deleting-my-chats

To delete your Grok chat history on grok.com/app and X, go to your chat settings and choose delete history. Remember, files and Imagine media don’t get deleted automatically—they need to be removed separately