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

https://lukasnpyy234.cavandoragh.org/how-do-i-find-my-grok-history-list-quickly-on-the-web

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