AlphaGeometry is an AI system that solves complex geometry problems at a level approaching a human Olympiad gold-medalist. The system combines a neural language model with a symbolic deduction engine to find solutions. AlphaGeometry was trained on a dataset of 100 million synthetic examples and can solve 25 out of 30 Olympiad geometry problems within the standard time limit. The system's performance is considered a breakthrough in AI reasoning in mathematics.