This chapter canvasses academic literature on artificial intelligence (AI) and judging. While the idea of ‘robot judges’ has been discussed with derision and fear, there is great promise for AI to improve the judiciary, both in terms of expediting process and in terms of the improving the substantive decisions of human judges. But the use of AI by judges is highly controversial. While much of the academic literature on AI and judging is relatively recent, it is already vast. The chapter is divided into four main topics. It begins by defining what is meant in this chapter by AI, a notoriously fuzzy concept. The field is broad, and the definition is constantly changing. The author primarily focuses on tools of prediction, such as supervised machine learning. Second, the chapter discusses how scholars of judicial behaviour have used machine learning tools to make predictions of how judges will behave. It then explores how courts around the world have already begun to use machine learning predictions in their decisions. Finally, literature outlining concerns and risks if AI tools were to be used more widely by judges is covered. Topics such as transparency, explanations, trust, bias, and error are explored.