langchain-ailangchain
The agent engineering platform.
TL;DR · 30-second scan
langchain (Python) — The agent engineering platform.
You are building multi-step AI pipelines (agents, complex RAG, tool use) and need the ecosystem.
AI & ML
The biggest LLM framework. Chains, agents, RAG pipelines, integrations with every model, vector DB, and tool. Strong ecosystem with LangGraph for agentic workflows. The criticism: for simple use cases the abstractions feel heavy and the API has churned across versions. Worth it once your AI stack outgrows direct API calls.
You are building multi-step AI pipelines (agents, complex RAG, tool use) and need the ecosystem.
You are just calling an LLM API and processing the response — use the native SDK directly.
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