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OpenAI

To use OpenAI embeddings, you need to import OpenAIEmbedding from llamaindex.

import { OpenAIEmbedding, serviceContextFromDefaults } from "llamaindex";

const openaiEmbedModel = new OpenAIEmbedding();

const serviceContext = serviceContextFromDefaults({
embedModel: openaiEmbedModel,
});

const document = new Document({ text: essay, id_: "essay" });

const index = await VectorStoreIndex.fromDocuments([document], {
serviceContext,
});

const queryEngine = index.asQueryEngine();

const query = "What is the meaning of life?";

const results = await queryEngine.query({
query,
});