OpenAI API – 101 Tutorial
Tags: business, javascript, cloud, api
Published: 2023-03-21 18:29:00

---
title: OpenAI API – 101 Tutorial
published: true
date: 2023-03-20 17:10:00 UTC
tags: Business,JavaScript,cloud,api
canonical_url: https://greenido.wordpress.com/2023/03/20/openai-api-101-tutorial/
---

OpenAI is a research organization focused on developing advanced artificial intelligence technology, and one way it achieves this is by making its technology available to developers through APIs. 

This blog post will explore what OpenAI API is and how to use it from Node.js – We will show a few examples you can take and combine with your current applications.   
Other good examples to explore the API are at [openai.com](https://platform.openai.com/examples).

## What is OpenAI API?

OpenAI API is a powerful tool allowing developers to access cutting-edge AI models that OpenAI researchers train. 

It’s (also) a mouthful, no?

These models can be used for various applications, including natural language processing, translation, image recognition, chatbots, etc.

The OpenAI API is designed to be easy to use, with a RESTful API that can be accessed using any programming language.   
It also includes pre-built models that can be used out of the box and the ability to train custom models using your own data.

## The different AI models

OpenAI API offers a wide range of pre-built AI models that can be used out of the box. These models are trained on massive datasets and can produce accurate results for various use cases.

Four AI engines are available (as of March 2023) on OpenAI API: DaVinci, curie, babbage, and ada. Each engine has strengths and weaknesses, making them suitable for specific tasks.

For instance, the DaVinci engine is one of the most powerful engines available on OpenAI API, with the ability to perform natural language processing (NLP), text summarization, and more. On the other hand, the curie engine is optimized for large-scale language generation tasks like chatbots and content creation.

1. [GPT-4](https://platform.openai.com/docs/models/gpt-4) (Limited beta) – The latest and most powerful model. It includes models that improve on GPT-3.5 and can understand and generate natural language or code.
2. [GPT-3.5](https://platform.openai.com/docs/models/gpt-3-5) – A set of models that improve on GPT-3 and can understand and generate natural language or code.
3. [DALL·E](https://platform.openai.com/docs/models/dall-e) (beta) – A model that generates and edits images with a natural language prompt.
4. [Whisper](https://platform.openai.com/docs/models/whisper) (beta) – A model that can convert audio into text.
5. [Embeddings](https://platform.openai.com/docs/models/embeddings) – A set of models that can convert text into a numerical form.
6. [Codex](https://platform.openai.com/docs/models/codex) (Limited beta) -A collection of models that can understand and generate code, including translating natural language to code.
7. [Moderation](https://platform.openai.com/docs/models/moderation) – A fine-tuned model that can detect whether text may be sensitive or unsafe.
8. [GPT-3](https://platform.openai.com/docs/models/gpt-3) – A set of models that can understand and generate natural language.

There are more details on each model [here](https://platform.openai.com/docs/models/overview).

## Use OpenAI API from Node.js

To use OpenAI API from Node.js, you must first sign up for an API key. Once you have your API key, you can use it to authenticate your requests to the API.

Here is an example of how to use OpenAI API from Node.js:

{% gist https://gist.github.com/greenido/8e840227c42ee0f896e52ee767da0764 %}


In this example, we use the _axios_ library to make a POST request to the OpenAI API. We are passing in our API key as an authorization header and specifying the _davinci-codex_ engine to generate text. We are passing in a prompt, the starting text for the generated text.

The API will then return a response with the generated text – In this example, you can see how to make a loaf of good bread.

You can also use openai npm model and the code will be (even) shorter:

{% gist https://gist.github.com/greenido/34ee9e3c694f245ae430dbc471c4ff92 %}

## Use OpenAI API for Image Recognition

In addition to natural language processing, the OpenAI API can also be used for image recognition. The process for using the API for image recognition is similar to using it for natural language processing.

First, you must have your API key ready to authenticate your requests. Second, you can use the axios library (or Got or any other library you wish) to request a POST request to the OpenAI endpoint.

Here’s an example of how to use OpenAI API for image recognition from Node.js:

{% gist https://gist.github.com/greenido/32fe7400a198e69163426da7640ca0c7 %}

In this example, we use the gpt3-davinci-002 engine to recognize an image. 

These tools allow you to integrate cutting-edge AI technology into your current React/Node.js web applications.

## Using OpenAI API for Language Translation

Another robust use case for OpenAI API is language translation. With the help of pre-built models, developers can easily translate text between different languages.

To use OpenAI API for language translation from Node.js, you must have an API key and authenticate your requests. Once authenticated, you can use the axios library to make a POST request to the API.

Here’s an example of how to use OpenAI API for language translation from Node.js:

{% gist https://gist.github.com/greenido/c8d938eeeabe8c95063e7c3057ec9ebe %}

In this example, we are using the DaVinci engine for language translation. We pass in a string of text and specify the target language we want to translate it into. The API will then return a response with the translated text.

With this functionality available through OpenAI API, developers can easily add language translation capabilities to their applications without training their own models or relying on third-party services.

## How to Fine-Tune Pre-built Models on OpenAI API Using Your Data

One of the most powerful features of OpenAI API is the ability to fine-tune pre-built models using your data. 

This allows you to train an AI model specifically tailored to your use case and produce more accurate results than a generic model.

To fine-tune a pre-built model on OpenAI API, you will need access to a large dataset of labeled examples. The more data you have, the better your model will perform.

Here are the general steps for fine-tuning a pre-built model on OpenAI API:

1. **Choose a Model:**  First, you will need to choose a pre-built model suitable for your task. For instance, choose the curie engine if you want to build a chatbot.
2. **Prepare Your Data:**  Next, you must label your data with relevant tags or categories. For example, if you are training a chatbot, you might label each message with an intent (e.g., “greeting”, “question”, “farewell”).
3. **Upload Your Data:**  Once your data is labeled, you can upload it to OpenAI API using the provided interface.
4. **Fine-Tune the Model:**  After uploading your data, you can start fine-tuning the pre-built model using OpenAI’s training interface. This process involves feeding in batches of labeled examples and allowing the model to learn from them over time.
5. **Evaluate Your Model:**  Once your model has been trained, you can evaluate its performance using a validation dataset not used during training.

By following these steps and experimenting with different hyper-parameters and datasets, you can create an optimized AI model for your specific use case without building one from scratch—quite powerful stuff.   
You get dive deeper on this topic with the [official tutorial](https://platform.openai.com/docs/guides/fine-tuning).

By the way, IBM, Microsoft, [AWS](https://aws.amazon.com/machine-learning/), and [GCP](https://cloud.google.com/products/ai) got similar services you should check before building your next AI project.

## Conclusion

As Sundar (Google CEO) said a few years ago:

> “AI is one of the most important things humanity is working on. It is more profound than electricity or fire.” 

In the past few months, we saw this wave [rising](https://www.bloomberg.com/news/articles/2023-02-06/openai-s-growing-list-of-competitors-anthropic-google-stability-ai-and-more).   
Big time.

OpenAI API is a powerful tool that can be used to access advanced AI models for a wide range of applications. I hope the above examples can help you ‘test the water.’

Go build something amazing.

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