Abstract: Artificial Intelligence (AI) models have evolved from simple rule-based systems to advanced deep learning architectures that mimic human cognitive abilities. This paper explores the transformative journey of AI models, highlighting key milestones, technological advancements, and their profound impact across industries. The discussion covers foundational models like perceptrons, the emergence of deep learning, the revolution of transformer-based architectures, and the advent of generative AI. We also examine the ethical challenges and the societal implications of AI growing leadership role in decision-making and innovation.