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LangChain · Class

RunnableParallel

RunnableParallel runs multiple runnables concurrently with the same input. It returns a mapping from each branch name to its output.

Last updated

Since
v1.7

Syntax

RunnableParallel(steps__: Mapping[str, Runnable[Input, Any] | Callable[[Input], Any] | Mapping[str, Runnable[Input, Any] | Callable[[Input], Any]]] | None = None, **kwargs)

In-depth API docs are only for subscribers: parameters, examples, common mistakes and interview practice.

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  • Runnable
  • RunnableSequence
  • RunnableLambda

Source: RunnableParallel | langchain_core | LangChain Reference. Checked 2026-11-03.