A new chatbot that lets you talk to AI versions of historical figures has caused some controversy—by charging users to talk to Adolf Hitler. The iPhone app, called Historical Figures, uses the ChatGPT algorithm to generate virtual versions of dead people, from Jesus to Jeffrey Epstein. Developed by 25-year-old Sidhant Chaddha, the app gives you access to 20,000 historical figures who can talk to users as if they were still alive. So it detects if it's saying things that are racist or hateful, these sorts of things—I don't want to show that to a user. "That could be harmful to students, especially if they're saying things that are harmful and hateful to the person they're talking to."