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

https://seo.edu.rs/blog/how-do-i-export-my-grok-chats-before-deleting-everything-11136

To delete your Grok chat history, go to grok.com/app and clear conversations directly from your chat list. On X, use the app’s settings to remove any linked chats