
https://www.youtube.com/watch?v=7McsRwyWBNE
Founded by Pedro Nobre & Luke Johnston

Large language models are fundamentally stochastic. No amount of scaling changes this - probabilistic systems cannot guarantee correctness. This is especially problematic in mission-critical domains that require mathematical certainty.
Formal verification provides exactly this: mathematical proof that code is correct for every possible input, not just the ones you test.
Previously, this technology has been limited to a small group of experts working over long horizons - restricting its application to narrow domains like software verification and research mathematics.
Cajal is using AI to massively scale this technology - deploying agents to autonomously discover and formalize tools across applied science, beginning with quantum computing and finance.
Introducing Tau: Tau is a multi-agent system that collaborates to discover and verify new mathematical proofs in Lean. Given a research direction, Tau autonomously formalizes large corpora of applied mathematics, discovering novel results with real-world applications - from algorithms with certified speedups to certificates that a system satisfies its constraints.
Every result is machine-verified by Lean's type-checking kernel, guaranteeing correctness.