To delete your Grok chat history, go to grok.com/app and remove chats...

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

To delete your Grok chat history, go to grok.com/app and remove chats individually or in bulk. Don’t forget to clear the Recently Deleted folder, where data stays for 30 days before permanent removal