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

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

To delete your Grok chat history on grok.com/app and X, go to your chat settings and select delete history. Remember, this only removes conversations, not files or Imagine media. You’ll need to delete those separately in their respective sections