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

https://sierra-wiki.win/index.php/How_Do_I_Stop_Grok_from_Using_My_Chats_for_Training_on_Grok.com%3F

To delete your Grok chat history on grok.com/app and X, open your chat, select the delete option, and confirm. Remember, deleted chats move to Recently Deleted where they stay for 30 days before permanent removal