Robinhood CEO’s Math-Centric AI Firm Harmonic Climbs to $1.45B Valuation

Harmonic, the math-focused AI startup founded by Robinhood’s CEO, has reached a $1.45B valuation after a major funding round to scale its provably correct AI models.

What if AI could think like a mathematician instead of a mimic? Harmonic’s new funding suggests that moment is closer than ever.

The AI startup, founded by Robinhood CEO Vlad Tenev, has raised $120 million to accelerate its development of Aristotle, its flagship mathematical reasoning model. The Series C round, led by Ribbit Capital with participation from Sequoia Capital, Index Ventures, Kleiner Perkins, and new investor Emerson Collective, values Harmonic at $1.45 billion.

The investment will fund continued development of Aristotle, Harmonic’s first MSI-class model, which, earlier this year, produced formally verified solutions to five of six International Mathematical Olympiad problems — a first for any AI system and a benchmark that positions ...