Lean FRO released Lean v4.33.1 on August 21 with fixes for soundness bugs found during a kernel bug hunt using OpenAI internal models, including two runtime exploits that could prove False. The collab…
The Palomar registry of Lean verified mathematics, incubated by the Lean FRO and ICARM, is now open for submissions, aiming to serve as a preprint server for Lean proofs by checking that formalized st…
Rocq is better than Lean for program verification, according to a LangSec keynote slide by an unnamed author, because Rocq natively supports executable coinductive types and cofixpoints in Type, while…
The Lean Theorem Prover, an open-source proof assistant and programming language, has reached 280,000+ formalized theorems and 2.4M+ lines of code with 750+ contributors as of July 2026, according to …
The Lean FRO and Mathlib Initiative have launched Tau Ceti, an open-source repository of formal mathematics where all code is written by AI contributors under human-directed roadmaps and adversarial A…
Harmonic AI, the $1.45 billion formal reasoning startup co-founded by Robinhood's Vlad Tenev and Tudor Achim, argues that AI benchmarks should be human-defined rather than generated by AI systems, a s…
A new approach to cybersecurity evaluations proposes using language models as constant red-team oracles to empirically compare the attack surfaces of different software implementations, such as OpenSS…