This Essay explores Artificial Intelligence (AI) Large Language Models (LLMs) like ChatGPT/GPT-4, detailing the advances and challenges in applying AI to law.  It first explains how these AI technologies work at an understandable level.  It then examines the significant evolution of LLMs since 2022 and their improved capabilities in understanding and generating complex documents, such as legal texts.  Finally, this Essay discusses the limitations of these technologies, offering a balanced view of their potential role in legal work.