LangChain Just Released Deep Agents — And It Changes How You Build AI Systems

Most people are still hand-crafting agent loops in LangGraph. Deep Agents is a higher-level answer to that - and it’s opinionated than you’d expect. 1.1 Deep agents in action There’s a pattern I’ve watched repeat itself across almost every team that gets serious about building agents. First, they try LangChain chains. Works fine for simple pipelines. Then the task gets complex - needs tool calls, needs to loop, needs to handle variable-length outputs - and chains stop being enough.