ChatDeepInfra

LangChain supports chat models hosted by Deep Infra through the ChatDeepInfra wrapper. First, you'll need to install the @langchain/community package:

tip

See this section for general instructions on installing integration packages.

npm

npm install @langchain/community

Yarn

yarn add @langchain/community

pnpm

pnpm add @langchain/community

You'll need to obtain an API key and set it as an environment variable named DEEPINFRA_API_TOKEN (or pass it into the constructor), then call the model as shown below:

import { ChatDeepInfra } from "@langchain/community/chat_models/deepinfra";
import { HumanMessage } from "@langchain/core/messages";

const apiKey = process.env.DEEPINFRA_API_TOKEN;

const model = "meta-llama/Meta-Llama-3-70B-Instruct";

const chat = new ChatDeepInfra({
  model,
  apiKey,
});

const messages = [new HumanMessage("Hello")];

const res = await chat.invoke(messages);

console.log(res);

API Reference:

• ChatDeepInfra from @langchain/community/chat_models/deepinfra
• HumanMessage from @langchain/core/messages

Related

• Chat model conceptual guide
• Chat model how-to guides