Perplexity 集成

使用 LangChain Python 与 Perplexity 集成。

Perplexity is the most powerful way to search the internet with unlimited Pro Search, upgraded AI models, unlimited file upload, image generation, and API credits.

您可以查看 a list of available models.

安装和设置

Install the Perplexity x LangChain integration package:

pip

pip install langchain-perplexity

获取您的 API 密钥 from the Perplexity API key dashboard and set it as the PERPLEXITY_API_KEY (or PPLX_API_KEY) environment variable. See the Perplexity getting started guide for more details.

聊天模型

See a variety of Perplexity usage examples.

from langchain_perplexity import ChatPerplexity

检索器

您可以使用 PerplexitySearchRetriever to fetch web search results from the Perplexity Search API as Document objects in a standard retrieval pipeline.

查看使用示例.

from langchain_perplexity import PerplexitySearchRetriever

工具

You can use Perplexity as an agent tool to give your agent access to the Perplexity Search API.

查看使用示例.

PerplexitySearchResults

A tool that queries the Perplexity Search API and returns a JSON array of results (title, URL, snippet, date, last updated).

from langchain_perplexity import PerplexitySearchResults

向量嵌入模型

You can use PerplexityEmbeddings to generate embeddings via the Perplexity Embeddings API.

查看使用示例.

from langchain_perplexity import PerplexityEmbeddings

Deep Agents CLI

Use Perplexity as a first-class provider in the Deep Agents CLI.

Install the CLI with the Perplexity extra:

uv

uv tool install 'deepagents-cli[perplexity]'

Then set PERPLEXITY_API_KEY and reference Perplexity models with the perplexity: prefix (e.g. perplexity:sonar-pro) in the interactive /model switcher or your config.

Components reference

Class	Abstraction	Import path	Description
ChatPerplexity	Chat model	from langchain_perplexity import ChatPerplexity	Chat model wrapping the Perplexity API for grounded chat completions.
PerplexitySearchRetriever	Retriever	from langchain_perplexity import PerplexitySearchRetriever	Retriever that returns Document objects from the Perplexity Search API.
PerplexitySearchResults	Tool	from langchain_perplexity import PerplexitySearchResults	Tool that returns Perplexity Search API results as a JSON array for agents.
PerplexityEmbeddings	Embeddings	from langchain_perplexity import PerplexityEmbeddings	Embedding model wrapping the Perplexity Embeddings API.

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