TextGrad: Backpropagating Language Model Feedback for Generative AI Optimization

This paper introduces TextGrad, a novel framework for optimizing generative AI systems. This method uses large language models (LLMs) to provide natural language feedback, acting as "textual gradients," to guide the improvement of various AI components. TextGrad enables automatic optimization across diverse tasks by backpropagating this feedback through a system's computation graph. The paper demonstrates TextGrad's effectiveness in areas like code refinement, question answering, prompt optimization, radiotherapy treatment planning, and enhancing compound AI systems. Ultimately, TextGrad aims to generalize the optimization process for complex AI systems in a manner analogous to backpropagation in neural networks.