Function-Native Agency
OpenAI's function calling feature changed the way agents interact with tools. Instead of the model "guessing" how to format a tool call, the API provides a structured way to define functions. LangChain's
LangChain OpenAI Functions Agent
April 19, 2026 • By Abdul Nafay • LangChain
Research Brief: LangChain OpenAI Functions Agent. How LangChain is being transformed by hierarchical reasoning agents and digital workforce integration.