Inside the little-known expert network quietly training every frontier AI model | Garrett Lord (Handshake CEO)

In this episode of Lenny's Podcast, host Lenny interviews Garrett Lord, the co-founder and CEO of Handshake, about their new AI-driven business that leverages their existing network of students and alumni to provide high-quality training data for AI labs. Garrett explains the shift from pre-training to post-training in AI model development, detailing the types of data needed, such as supervised fine-tuning, reinforcement learning, and trajectories. He emphasizes the importance of experts in data labeling and the competitive advantage Handshake has due to its access to a vast audience of academics and professionals. Garrett also shares insights into building the new AI business within the existing company, highlighting the strategies and challenges they faced, and touches on the future of AI and its impact on job matching and the labor market.