.@HamelHusain and @Sh_reya's online course—AI Evals for Engineers & PMs—is the #1 highest-grossing course on Maven (by far), and consistently brings in large groups from all the major AI labs. This is because they teach something crucial: how to build evaluations that actually improve your product, not just generate vanity dashboards. Over the past two years, Hamel and Shreya have played a major role in shifting evals from being an obscure, mysterious subject to one of the most necessary skills for AI product builders. After training more than 2,000 PMs and engineers, and leaders at over 500 companies, they’re now sharing their complete playbook—the same methodology taught at @OpenAI, @AnthropicAI, and other leading labs. You’ll learn how to ground your evals in reality with error analysis, build robust evals you can trust, and create a continuous improvement flywheel that catches regressions before they ship. Don't miss this one: Limited-time offer: Get 35% off Hamel and Shreya's course by using code LENNYSLIST at checkout. This is the largest discount they've ever offered on their course. I highly recommend you hop on this asap. Enrollment closes in 2 days. Register here: Thank you for sharing this gold with us, Hamel and Shreya 🙏