In this memorandum, investor Howard Marks explores the rapid evolution of artificial intelligence, emphasizing its transition from a simple tool to an autonomous agent capable of independent execution. He distinguishes between the training and inference phases of AI, noting that modern models now simulate human-like reasoning and synthesis rather than just retrieving data. Marks highlights the unprecedented speed of AI adoption, which far outpaces historical technological shifts like the personal computer or the internet. While he acknowledges the economic potential for AI to handle complex labor, he also raises significant concerns regarding job displacement and the societal impact of rapid automation. For investors, he suggests that while AI can process quantitative data efficiently, human intuition and qualitative judgment remain essential for achieving superior results in novel situations. Ultimately, Marks views the technology as a transformative force and recommends a balanced investment approach that avoids both total exclusion and reckless overexposure.