Harmonic, an AI math startup co-founded by Robinhood CEO Vlad Tenev, unveils its model Aristotle, saying it achieved gold medal performance on the 2025 IMO (Maxwell Zeff/TechCrunch)

Maxwell Zeff / TechCrunch: Harmonic, an AI math startup co-founded by Robinhood CEO Vlad Tenev, unveils its model Aristotle, saying it achieved gold medal performance on the 2025 IMO  —  Harmonic, an AI startup co-founded by Robinhood CEO Vlad Tenev, announced Monday the beta launch of an iOS and Android chatbot app …