Leanstral: base open-source per un vibe-coding affidabile

Mistral AI has introduced Leanstral, a specialized open-source agent designed to generate code and formally prove its correctness using the Lean 4 proof assistant. This powerful tool aims to accelerate development in high-stakes fields by automating the time-consuming process of human verification for critical software and advanced mathematics. Despite its efficient size, benchmarks show Leanstral significantly outperforms larger open-source models and offers a cost-effective alternative to proprietary competitors. The model demonstrates its practical value by adeptly handling real-world tasks, from diagnosing obscure compiler bugs to translating and reasoning about programming language specifications.