Vitalik Buterin Proposes Language to Make AI Proofs Readable
Ethereum co-founder Vitalik Buterin proposed a new programming language. It would compile directly into Lean or HOL, another formal proof assistant. The idea targets a specific gap in how people read AI output. Artificial intelligence increasingly produces large blocks of automated proofs, often faster than any human team could write them by hand. Few readers can quickly confirm what those proofs actually establish. A Language Built Only for AI Proof Readers Lean is a proof assistant, a software that mathematicians and engineers use to write proofs a computer can check line by line. Ethereum researchers already use on it to verify cryptographic code and consensus logic. Proof assistants have existed for nearly 60 years, yet the field has stayed a niche pursuit. A new type of “high-level programming language” that seems really worth trying to make, is a language that gets compiled to Lean (or HOL, or…) that is specifically about making it as friendly as possible for a human to read definitions and theorems. Not the proofs – as all… — vitalik.eth (@VitalikButerin) July 21, 2026 In his post, Buterin argued that a proofs internal steps carry only one requirement. That requirement is mathematical correctness, nothing more. Readers never inspect that machinery directly. Definitions and theorems









