Harmonic, an AI startup founded by Robinhood CEO Vlad Tenev, has launched 'Aristotle,' an AI chatbot app for iOS and Android. Aristotle aims to provide accurate, 'hallucination-free' answers to math-related questions using its AI model. Harmonic plans to release an API for enterprises and a web app for consumers, claiming Aristotle achieved gold medal performance on the International Math Olympiad (IMO) through a formal test. The company recently raised $100 million in a Series B round led by Kleiner Perkins, valuing it at $875 million. Harmonic aims to create 'mathematical superintelligence' and believes that math is a critical domain for AI development due to its verifiable nature.