ACM AI Letters (AILET) is envisioned to become the premier rapid-publication venue for impactful, concise, and timely communications in AI. Bridging a crucial gap between traditional conferences and journals, ACM AI Letters will feature short peer-reviewed contributions that accelerate knowledge dissemination across academia and industry. This unique publication prioritizes theoretical breakthroughs, algorithmic innovation, practical real-world applications, and critical societal implications, including ethics, policy, and responsible AI. It also introduces a distinctive space for rigorously reviewed opinion pieces and policy briefs, promoting swift engagement with contemporary issues shaping the AI landscape.