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To use together embeddings, you need to import TogetherEmbedding from llamaindex.

import { TogetherEmbedding, Settings } from "llamaindex";

Settings.embedModel = new TogetherEmbedding({
apiKey: "<YOUR_API_KEY>",

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({

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