2026-03-032026-03-03April 202510.48550/arXiv.2504.07139https://hdl.handle.net/20.500.12424/4321300The 2025 Index is our most comprehensive to date and arrives at an important moment, as AI's influence across society, the economy, and global governance continues to intensify. New in this year's report are in-depth analyses of the evolving landscape of AI hardware, novel estimates of inference costs, and new analyses of AI publication and patenting trends. We also introduce fresh data on corporate adoption of responsible AI practices, along with expanded coverage of AI's growing role in science and medicine. The AI Index offers one of the most comprehensive, data-driven views of artificial intelligence. Recognized as a trusted resource by global media, governments, and leading companies, the AI Index equips policymakers, business leaders, and the public with rigorous, objective insights into AI’s technical progress, economic influence, and societal impact.1 online resource (457 pages)engThe AI Index 2025 Annual Report by Stanford University is licensed under Attribution-NoDerivatives 4.0 International.Responsible AI ImplementationAI GovernanceFrontier AI DevelopmentIndustry Dominance in AI ResearchGlobal AI Governance CoordinationStandardized Evaluation FrameworksEthics of artificial intelligence/machine learningReportStanford University