To delete your Grok chat history on grok.com/app or X, open your chat, choose...

https://stateofseo.com/how-do-i-handle-a-stubborn-grok-file-that-wont-delete/

To delete your Grok chat history on grok.com/app or X, open your chat, choose delete, and confirm. Remember, deleted chats go to Recently Deleted and stay there for 30 days before permanent removal