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

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 clear conversations from your chat list. On X, remove messages directly from the thread. Remember, deleting chat doesn’t erase files or Imagine media—they need to be deleted separately