What is LangChain?
LangChain is the most widely-adopted framework for chaining LLM calls, tool use and retrieval. It's a fast way to prototype, though teams often graduate to lighter-weight code at scale.
Pros & Cons
Pros
- ✓ Huge library of integrations.
- ✓ LangSmith observability stack.
Cons
- ✗ Abstraction layers can be heavy.
- ✗ API churn year over year.
Alternatives to LangChain
FAQ
Do I need LangChain?+−
Great for prototypes and agents. For simple chat or RAG, plain SDK calls are often clearer.