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

https://garrettwigp625.tearosediner.net/how-do-i-delete-files-from-grok-the-ones-people-forget-a-full-cleanup-guide

To delete your Grok chat history, go to grok.com/app and clear conversations from your chat list. On X, remove chats directly in the messaging area. Remember, files and Imagine media like images aren’t deleted with chats—they need separate removal