Meituan Open-Sources 560B Parameter Theorem Proving Model, Achieving 97.1% Pass Rate on 72 Inferences Refreshing Open-Source SOTA
Meituan's LongCat team open-sourced LongCat-Flash-Prover on March 21, a MoE model with 560 billion parameters, focused on Lean4 formal theorem proving. The model is divided into three capabilities: automatic formalization, sketch generation, and complete proof generation, combining reasoning tools with the Lean4 compiler for real-time verification. Training employs the Hybrid-Experts Iteration Framework and HisPO algorithm to prevent reward manipulation. Benchmark tests show that the model has set records for open-source weight models in automatic formalization and theorem proving.
