Mahesh Sathiamoorthy

Mahesh Sathiamoorthy is co-founder and CEO of Bespoke Labs, built on the thesis that data curation and RL environment design are the real levers behind frontier model performance. A former engineer at Google DeepMind with a PhD from USC, his team produced OpenThoughts (2.3k-star open reasoning dataset, led by Bespoke Labs with the DataComp community) and Curator (1.7k-star synthetic data pipeline he co-created). He speaks from first-hand experience shipping post-training data recipes and reinforcement-learning systems — expect concrete, practitioner-level insight into how data recipes and RL actually move benchmark numbers.