Project-Numina has launched NuminaMath 1.5, an advanced AI training dataset for mathematical reasoning.NuminaMath 1.5 offers approximately 900,000 competition-level mathematical problems with structured Chain of Thought (CoT) methodology.The dataset includes enriched problem metadata, such as final answers, mathematical domains, and problem types.NuminaMath 1.5 focuses on curated and verified data, removing synthetic problems and ensuring high-quality resources for AI training.