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

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

To delete your Grok chat history, go to grok.com/app and delete each conversation you want to remove. Then check the Recently Deleted folder, where messages stay for 30 days before permanent deletion