To delete your Grok chat history on grok.com/app and X, open your chat list,...

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, open your chat list, select the conversation, and choose “Delete.” Remember, deleting chats does not remove files or Imagine media—they must be deleted separately