We’re excited to announce that the Public Preview of our personal health coach will begin rolling out tomorrow. Our goal is to empower individuals to live longer, healthier lives by offering a proactive, personalized, and adaptive AI-powered coach. This initiative is built on a foundation of science, continuous feedback from experts, and real-world user input. We’re approaching this work with care and intention, iterating based on rigorous evaluation and research. The coach is designed to be safe, helpful, accurate, relevant, and deeply personalized. To ensure quality, we’ve validated its performance using data from over 100,000 hours of human evaluation, conducted by both generalists and specialists in key health domains—including fitness, family medicine, sleep science, and behavioral psychology. Our research is central to the development of this tool. We’ve published several key studies that guide how we build and assess the health coach: - The Anatomy of a Personal Health Agent: Explores the core components that make an AI health coach effective and trustworthy. - Principle-Based Framework for the Development and Evaluation of Large Language Models for Health and Wellness: Outlines the ethical and scientific principles that govern our model’s design and evaluation. - Evolving Weekly Cardio Load: Demonstrates how the coach can adapt training recommendations over time based on user progress and goals. - Advancing Personal Health and Wellness Insights with AI: Highlights how AI can deliver nuanced, actionable insights in areas like nutrition, activity, and mental well-being. - Substance Over Style: Evaluating Proactive Conversational Coaching Agents: Focuses on measuring real-world impact, not just conversational fluency, to ensure the coach delivers meaningful health outcomes. These efforts reflect our commitment to building a health coach that doesn’t just respond to questions, but anticipates needs, supports long-term behavior change, and evolves with each user. We’re listening closely to feedback from the scientific community and our users to continuously improve the experience.