# Code Nodes Slash AI Costs 19x by Replacing Unnecessary LLM Calls - Date: 2026-03-23 - Category: Artificial Intelligence A research team spanning East China Normal University, Beihang, Fudan, and Shanghai UIBE has built something that pushes against one of the more persistent inefficiencies in agentic AI systems: the assumption that every step of a workflow needs a language model. Their system, HyEvo, automaticall... ---