OpenAI

import { OpenAIEmbedding } from "@llamaindex/openai";
import { Document, Settings, VectorStoreIndex } from "llamaindex";
 
Settings.embedModel = new OpenAIEmbedding();
 
const document = new Document({ text: essay, id_: "essay" });
 
const index = await VectorStoreIndex.fromDocuments([document]);
 
const queryEngine = index.asQueryEngine();
 
const query = "What is the meaning of life?";
 
const results = await queryEngine.query({
  query,
});