Pythagoras-Prover just made Lean theorem proving look far less dependent on giant models, with a 4B prover beating DeepSeek-Prover-V2-671B at MiniF2F Pass@32.
Shows in formal reasoning, better data geometry can buy back an astonishing amount of scale.
A theorem prover is not just a language model writing clever math; it is a machine trying to produce text that survives a compiler with no patience for style, confidence, or almost-right reasoning.
The main trick is data efficiency: the team built about 800K Lean-verified examples, trained from easy to hard, then used LoRA so the model learned without updating every parameter.
🚀🚀 Introducing Pythagoras-Prover 🚀🚀 🔹 The smallest theorem prover to date – Pythagoras-Prover-4B 🔹 The first proof-of-concept diffusion theorem proving mo...