AI Engineering
LangGraph vs LangChain: Which One Should You Use in 2026?
LangChain and LangGraph are not competitors — they are two layers of the same stack. LangChain gives you model integrations and a fast path to a working agent; LangGraph gives you the stateful, cyclic runtime that keeps that agent alive in production. This guide breaks down the architectural difference, shows the same task built both ways, and gives you a clear rule for when to drop from one to the other.
August 27, 2026 · 10 min