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

https://source-wiki.win/index.php/Where_is_the_Delete_All_Conversations_Button_in_Grok_Settings%3F

To delete your Grok chat history on grok.com/app and X, go to your chat settings and choose “Delete History.” Remember, deleting chats there doesn’t remove any files or Imagine media you shared—they need to be deleted separately