The Global Assessment of Responsible AI in Cities offers a comprehensive overview of how artificial intelligence is transforming urban environments worldwide. Drawing from a global survey, 70+ case studies, and expert consultations, the report uncovers the benefits and risks of rapidly expanding AI adoption in cities. It highlights how AI is improving mobility, public services, safety, and planning, while also exposing critical challenges—from data privacy and high implementation costs to skills shortages and regulatory gaps. The assessment emphasizes that truly responsible AI requires strong governance, inclusive participation, and capacity-building across institutions, especially in the Global South. With clear recommendations, the report equips city leaders, policymakers, and practitioners with actionable guidance to implement AI that is ethical, people-centred, and aligned with the Sustainable Development Goals.