Lowering the Barriers of Mathematical Research: Mistral AI Releases the Open-Source Model Leanstral 1.5

Mistral AI released Leanstral1.5, an open-source model for Lean4 under Apache-2.0. It has 119B total parameters but only 6B active, balancing performance and cost. It achieved 100% completion on both validation and test sets of the miniF2F formal math benchmark and has tackled challenging reasoning tasks like Putnam.....