langchain/libs/partners/perplexity

langchain-perplexity

This package contains the LangChain integration with Perplexity.

Installation

pip install -U langchain-perplexity

And you should configure your perplexity credentials and then set the PPLX_API_KEY environment variable.

Usage

This package contains the ChatPerplexity class, which is the recommended way to interface with Perplexity chat models.

import getpass
import os

if not os.environ.get("PPLX_API_KEY"):
  os.environ["PPLX_API_KEY"] = getpass.getpass("Enter API key for Perplexity: ")

from langchain.chat_models import init_chat_model

llm = init_chat_model("llama-3.1-sonar-small-128k-online", model_provider="perplexity")
llm.invoke("Hello, world!")