AI Agent Frameworks 2026
The frameworks for building production AI agents. Pick by use case. 1. LangChain The original. Massive ecosystem. Good for: prototyping, RAG pipelines. Pros: huge community, integrations everywhere Cons: bloated, abstractions sometimes harmful, frequently breaking changes 2. LangGraph State machine for agents. Sister to LangChain. Best for: complex multi-step workflows with branching. Pros: expli…