Luis von Ahn, CEO of Duolingo, aims to transform the popular language-learning app into an automated AI tutor. Von Ahn, who grew up with little money in Guatemala and recently became a billionaire, envisions the AI-driven platform potentially replacing one-on-one human tutors. As part of this transformation, Duolingo has unveiled an interactive AI feature allowing users to 'video call' with its Lily mascot, powered by GPT-4o. This feature is available in the $30/month Duolingo Max tier. These announcements were made at Duocon 2024 in Pittsburgh, signaling a significant shift in language education.