All functionality related to OpenAI
OpenAI is American artificial intelligence (AI) research laboratory consisting of the non-profit OpenAI Incorporated and its for-profit subsidiary corporation OpenAI Limited Partnership. OpenAI conducts AI research with the declared intention of promoting and developing a friendly AI. OpenAI systems run on an Azure-based supercomputing platform from Microsoft.
The OpenAI API is powered by a diverse set of models with different capabilities and price points. ChatGPT is the Artificial Intelligence (AI) chatbot developed by OpenAI.

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Installation and Setup

  • Get an OpenAI api key and set it as an environment variable (OPENAI_API_KEY)

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Chat model

See a usage example. 
import { ChatOpenAI } from "@langchain/openai";

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LLM

See a usage example.
See this section for general instructions on installing integration packages.
npm
npm install @langchain/openai @langchain/core

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

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Text Embedding Model

See a usage example 
import { OpenAIEmbeddings } from "@langchain/openai";

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Chain

import { OpenAIModerationChain } from "langchain/chains";