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

https://smart-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 conversations there, then do the same on X if you use Grok there. Don’t forget to delete files and Imagine media separately—they aren’t removed with chats