AI startup Harmonic, co-founded by Robinhood CEO Vlad Tenev, has successfully raised $120 million in a funding round led by Ribbit Capital, with contributions from Sequoia, Kleiner Perkins, and Emerson Collective. This latest investment elevates Harmonic's valuation to $1.45 billion. Harmonic's innovative technology, 'Mathematical Super Intelligence (MSI),' is designed to overcome AI hallucination issues by utilizing formal logic instead of statistical prediction. Its flagship model, Aristotle, has shown impressive results in the International Mathematical Olympiad, rivaling top research labs like Google and OpenAI. Aristotle employs the Lean4 programming language to produce verifiable reasoning steps, making it particularly valuable for high-risk sectors such as aerospace and finance. Currently, the model is accessible to developers and mathematicians through a free API, with plans for commercialization underway.