As cyber threats continue to evolve and pose significant risks to digital systems, the need for robust cyber security solutions has become increasingly critical. Artificial Intelligence (AI) has emerged as a powerful technology with the potential to revolutionize cyber security practices. This research paper presents a comprehensive analysis of the intersection between AI and cyber security, exploring the applications of AI in detecting, preventing, and responding to cyber threats. It investigates various AI techniques, including anomaly detection, machine learning, natural language processing, and deep learning, highlighting their effectiveness in enhancing cyber security defenses. The paper also examines the challenges and ethical considerations associated with AI in cyber security and provides insights into future directions and emerging trends. By delving into the current state of AI in cyber security, this paper sheds light on its potential to mitigate cyber risks and safeguard digital systems. The research findings contribute to a better understanding of the practical implications of AI in cyber security and offer valuable insights for researchers, practitioners, and policymakers working in the field. Ultimately, this analysis underscores the significance of AI as a powerful tool for addressing the ever-evolving landscape of cyber threats and bolstering the resilience of digital infrastructures.