Robinhood CEO’s AI Startup Harmonic Launches Chatbot App
▼ Summary
– Harmonic launched a beta version of its AI chatbot app, Aristotle, for iOS and Android, offering “hallucination-free” answers for math-related questions.
– The startup aims to develop “mathematical superintelligence” (MSI) and expand Aristotle’s capabilities to fields like physics, statistics, and computer science.
– Aristotle achieved gold medal performance on the 2025 International Math Olympiad (IMO) using formal tests, unlike Google and OpenAI’s informal natural language tests.
– Harmonic recently raised $100 million in Series B funding at an $875 million valuation, with plans to release an API for enterprises and a web app for consumers.
– Aristotle ensures accuracy by generating responses in the Lean programming language and verifying solutions algorithmically, avoiding AI-based hallucinations.
Harmonic, the AI startup co-founded by Robinhood CEO Vlad Tenev, has unveiled its new chatbot app, Aristotle, now available in beta for iOS and Android. The company promises “hallucination-free” responses for math-related queries, a significant claim given the persistent accuracy challenges plaguing most AI models today. Focused on developing mathematical superintelligence (MSI), Harmonic aims to expand Aristotle’s capabilities to fields like physics, statistics, and computer science, where precise quantitative reasoning is critical.
Tudor Achim, Harmonic’s CEO, emphasized that Aristotle stands apart by formally verifying its outputs, ensuring reliability in quantitative domains. Unlike other AI models that generate answers through probabilistic methods, Aristotle uses the open-source programming language Lean to validate solutions algorithmically before delivering responses. This approach mirrors verification techniques used in high-stakes industries such as aerospace and healthcare.
The beta launch follows Harmonic’s recent $100 million Series B funding round, led by Kleiner Perkins, valuing the startup at $875 million. Investors appear confident in Harmonic’s ambitious roadmap, particularly after Aristotle demonstrated gold medal-level performance on the 2025 International Math Olympiad (IMO) in a formal, machine-readable test. While competitors like Google and OpenAI have also achieved top IMO scores, their models were tested informally using natural language inputs.
Math proficiency is emerging as a key benchmark for AI reasoning capabilities, with major tech firms prioritizing numerical problem-solving in their models. Beyond its immediate applications, Harmonic believes mastering mathematical logic could unlock broader advancements in AI reliability. However, the company has yet to release additional performance benchmarks, leaving some questions unanswered about Aristotle’s real-world scalability.
For now, Harmonic is concentrating on refining Aristotle’s core functionality before expanding access via an enterprise API and web app. If successful, the startup could carve out a niche in an increasingly crowded AI landscape by delivering unparalleled accuracy in quantitative domains, a selling point that might just justify its lofty valuation.
(Source: TechCrunch)
