OpenProver: Open-Source AI for Interactive Theorem Proving.

Mat\v{e}j Kripner, Milan Straka· July 13, 2026 View original

Summary

OpenProver is an open-source system for LLM-driven automated theorem proving integrated with Lean 4 formal verification. It features a Planner-Worker-Verifier architecture, offers reproducible evaluation, and provides an interactive interface for human-guided proof search, showcasing human-AI synergy.

A new open-source system named OpenProver has been released, designed for automated theorem proving (ATP) using large language models (LLMs) and integrated with the Lean 4 formal verification system. OpenProver employs an agentic architecture, similar to Aletheia, which includes a Planner to manage tasks, Workers to execute them, and a Verifier to ensure correctness. The system is fully open-source, allowing for reproducible evaluations through automatic formal verification of generated proofs. It also features an interactive terminal interface, enabling human operators to monitor and steer the proof search process. This interactive capability highlights the potential for effective human-AI collaboration in complex mathematical and logical tasks, demonstrating strong performance on benchmarks like ProofNet.

Why it matters

This tool democratizes access to advanced AI-driven theorem proving, offering a powerful resource for researchers, educators, and developers working on formal verification, software correctness, and mathematical discovery.

How to implement this in your domain

  1. 1Download and experiment with OpenProver for formal verification tasks in software development or mathematical research.
  2. 2Integrate OpenProver's ATP capabilities into your development pipeline for automated code correctness checks.
  3. 3Utilize the interactive mode to explore human-AI collaboration in complex logical problem-solving.
  4. 4Contribute to the open-source project to adapt it for specific domain needs or enhance its capabilities.

Who benefits

Software DevelopmentAcademiaCybersecurityAI/ML DevelopmentLegalTech

Key takeaways

  • OpenProver is an open-source, LLM-driven automated theorem prover with Lean 4 integration.
  • It uses a Planner-Worker-Verifier agentic architecture.
  • The system offers reproducible evaluation and an interactive human-AI interface.
  • It demonstrates strong performance on formal verification benchmarks.

Original post by Mat\v{e}j Kripner, Milan Straka

"arXiv:2607.09217v1 Announce Type: new Abstract: In this system paper, we present OpenProver, an open-source system for LLM-driven automated theorem proving (ATP) with integrated Lean 4 formal verification. OpenProver integrates a Planner-Worker-Verifier architecture inspired by r…"

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