Niklas Muennighoff, a PhD student at Stanford, dives into his groundbreaking work on the S1 reasoning model, designed to efficiently mimic OpenAI's O1 while costing under $50 to train. He elaborates on innovative techniques like 'budget forcing' that help the model tackle complex problems more effectively. The discussion highlights the intricacies of test-time scaling, the importance of data curation, and the differences between supervised fine-tuning and reinforcement learning. Niklas also shares insights on the future of open-sourced AI models.