2 docs tagged with "LangChain"

The four Lang* tools in one place — what each is, how they differ, and when to use which. LangChain builds it, LangGraph orchestrates it, LangSmith watches it, Langflow lets you draw it.

The LangChain v1 essentials — create_agent, one init_chat_model call across OpenAI/Gemini/Groq, the message types, tool binding and the tool-calling loop, structured output with Pydantic/TypedDict, and middleware like summarization.