LangChain is introducing a new type of agent executor called "Plan-and-Execute," which is designed to address the limitations of existing "Action" agents by separating high-level planning from short-term execution. Inspired by concepts from BabyAGI and the Plan-and-Solve paper, this new framework aims to handle complex long-term planning more effectively, albeit with increased calls to language models. The Plan-and-Execute agents utilize a planner, typically a language model, to strategize steps and an executor to implement them, allowing for improved reliability and flexibility. While the approach involves more calls, it promises future enhancements like better support for long sequences of steps, revisiting plans, and rigorous evaluation methods, drawing inspiration from existing work to refine the system.