Generative Pre-Trained Transformer 3 (GPT-3) and Generative Pre-Trained Transformer 4 (GPT-4) are two of the most recent advancements for refining and developing AI. GPT-3 was introduced in May 2020, while its successor, GPT-4, is expected to be publicly available in early 2023. Both GPT models offer sophisticated natural language processing capabilities, but there are notable differences between them.