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Structured extraction in Typescript, powered by llms, designed for simplicity, transparency, and control.

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Dive into the world of Typescript-based structured extraction, by OpenAI's function calling API and Zod, typeScript-first schema validation with static type inference. Instructor stands out for its simplicity, transparency, and user-centric design. Whether you're a seasoned developer or just starting out, you'll find Instructor's approach intuitive and steerable.

Check us out in Python, Elixir and PHP.

If you want to port Instructor to another language, please reach out to us on Twitter we'd love to help you get started!


To check out all the tips and tricks to prompt and extract data, check out the documentation.

import Instructor from "@instructor-ai/instructor";
import OpenAI from "openai"
import { z } from "zod"

const oai = new OpenAI({
  apiKey: process.env.OPENAI_API_KEY ?? undefined,
  organization: process.env.OPENAI_ORG_ID ?? undefined

const client = Instructor({
  client: oai,
  mode: "FUNCTIONS"

const UserSchema = z.object({
  // Description will be used in the prompt
  age: z.number().describe("The age of the user"), 
  name: z.string()

// User will be of type z.infer<typeof UserSchema>
const user = await{
  messages: [{ role: "user", content: "Jason Liu is 30 years old" }],
  model: "gpt-3.5-turbo",
  response_model: { 
    schema: UserSchema, 
    name: "User"

// { age: 30, name: "Jason Liu" }

Why use Instructor?

The question of using Instructor is fundamentally a question of why to use zod.

  1. Powered by OpenAI — Instructor is powered by OpenAI's function calling API. This means you can use the same API for both prompting and extraction.

  2. Customizable — Zod is highly customizable. You can define your own validators, custom error messages, and more.

  3. Ecosystem Zod is the most widely used data validation library for Typescript.

  4. Battle Tested — Zod is downloaded over 24M times per month, and supported by a large community of contributors.

More Examples

If you'd like to see more check out our cookbook.

Installing Instructor is a breeze.


If you want to help out, checkout some of the issues marked as good-first-issue or help-wanted. Found here. They could be anything from code improvements, a guest blog post, or a new cook book.


This project is licensed under the terms of the MIT License.