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OpenAI

Here's how you can initialize an OpenAI LLM instance:

tip

See this section for general instructions on installing integration packages.

npm install @langchain/openai
tip

We're unifying model params across all packages. We now suggest using model instead of modelName, and apiKey for API keys.

import { OpenAI } from "@langchain/openai";

const model = new OpenAI({
  model: "gpt-3.5-turbo-instruct", // Defaults to "gpt-3.5-turbo-instruct" if no model provided.
  temperature: 0.9,
  apiKey: "YOUR-API-KEY", // In Node.js defaults to process.env.OPENAI_API_KEY
});
const res = await model.invoke(
  "What would be a good company name a company that makes colorful socks?"
);
console.log({ res });

If you're part of an organization, you can set process.env.OPENAI_ORGANIZATION to your OpenAI organization id, or pass it in as organization when initializing the model.

Custom URLs​

You can customize the base URL the SDK sends requests to by passing a configuration parameter like this:

const model = new OpenAI({
  temperature: 0.9,
  configuration: {
    baseURL: "https://your_custom_url.com",
  },
});

You can also pass other ClientOptions parameters accepted by the official SDK.

If you are hosting on Azure OpenAI, see the dedicated page instead.

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