
Can AI hold identity, follow protocol, show empathy, and do it all under 500ms? We evaluated this across 50 healthcare coaching episodes, five tracks, and two models. Initial results from a constrained production domain. Making one of the first voice agents that feel human. Not "human-like." Not "empathetic-sounding." Actually indistinguishable from a trained professional, at the speed of natural conversation. Persona 001 runs healthcare coaching calls in production. 25-minute intakes, weekly check-ins, PHQ-2 screenings. Real patients scripts, real clinical constraints. Here is how 🧵





















