ChatGPT-4 Surpasses Residents: A Study of Artificial Intelligence Competency in Plastic Surgery In-service Examinations and Its Advancements from ChatGPT-3.5.

Background: ChatGPT, launched in 2022 and updated to Generative Pre-trained Transformer 4 (GPT-4) in 2023, is a large language model trained on extensive data, including medical information. This study compares ChatGPT's performance on Plastic Surgery In-Service Examinations with medical residents nationally as well as its earlier version, ChatGPT-3.5.