Template-Type: ReDIF-Book 1.0 Author-Name: Leonardo Gambacorta Author-Name: Vatsala Shreeti Title: The AI supply chain Abstract: The rapid advancement of artificial intelligence (AI) relies on a complex supply chain comprising five key layers: hardware, cloud infrastructure, training data, foundation models and AI applications. This paper examines the market structure of each layer and highlights the economic forces shaping them: rapid technological change, high fixed costs, economies of scale, network effects and, in some cases, strategic behaviour by dominant firms. We also highlight the expanding influence of big tech companies across the AI supply chain. We discuss the challenges for consumer choice, innovation, operational resilience, cyber security and financial stability. Creation-Date: 2025-03 Year: 2025 Month: March File-URL: http://www.bis.org/publ/bppdf/bispap154.pdf File-Format: Application/pdf File-Function: Full PDF document File-URL: http://www.bis.org/publ/bppdf/bispap154.htm File-Format: text/html ISBN: 978-92-9259-843-3 Number: 154 Handle: RePEc:bis:bisbps:154