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This page covers all LangChain integrations with Parallel.

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Installation and setup

The Parallel integration lives in its own partner package: 
pip install -U langchain-parallel
Set the PARALLEL_API_KEY environment variable to your Parallel API key. Sign up at platform.parallel.ai to obtain one.

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Chat models

ChatParallel

OpenAI-compatible chat model with optional web research and per-field citations on the research tiers.

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Tools

ParallelSearchTool

Search the web and get structured, LLM-optimized excerpts back.

ParallelExtractTool

Extract clean markdown content from a list of URLs.

ParallelFindAllTool

Discover entities that satisfy a set of boolean match conditions.

Task API

Run research-grade tasks: single ad-hoc, deep research, batch enrichment. ParallelTaskRunTool, ParallelDeepResearch, ParallelTaskGroup, ParallelEnrichment.

ParallelMonitor

Schedule a query on a recurring cadence and receive events when relevant new content shows up.

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Retrievers

ParallelSearchRetriever

BaseRetriever over Parallel Search. Returns list[Document] for drop-in use in any RAG pipeline.
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