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

https://list-wiki.win/index.php/How_Do_I_Delete_One_Grok_Conversation_on_the_Web%3F

To delete your Grok chat history, go to grok.com/app and clear your chats there. On X, delete messages directly in the conversation. Remember, files and Imagine media aren’t removed this way—you’ll need to delete those separately