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Generative AI: OpenAI API, Gemini, DeepSeek, and ChatGPT (Udemy.com)

Empower Your Business With GenAI, Artificial Intelligence, GPT-5, DeepSeek, and More!

Created by: Lazy Programmer Inc.

Last updated February 2026

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What you will learn

  • How to setup and use the OpenAI API with ChatGPT
  • How to effectively use prompt engineering
  • RAG (retrieval-augmented generation) with the OpenAI Embeddings API
  • FAISS (Facebook AI Similarity Search)
  • How to Fine-Tune ChatGPT

How it compares

Against the other 461 rated Udemy courses in Data Science on CourseDuck:

  • Rating4.7 out of 5higher than 85% of them
  • Reviews1,048#148 of 462 by number of reviews
  • Length10.1 hourslonger than 56% of them
  • Last updatedFebruary 2026more recently than 67% of them

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Course Description

Welcome to the forefront of artificial intelligence with our groundbreaking course on Generative AI (GenAI), the OpenAI API, DeepSeek, and ChatGPT. With ChatGPT and DeepSeek, you'll learn how to build with the world's most advanced Large Language Models (LLMs). This course is a must-have if you want to know how to use this cutting-edge technology for your business and work projects.

This course contains 5 main sections:


  1. Basic API Usage: All the fundamentals: signup for an account, get your API key, set environment variables on Windows / Linux / Mac, using the API in Python, setup billing, understand the pricing model, and OpenAI's usage policies. Of note is the chatbot tutorial, which goes over how to incorporate chat history into the model so that ChatGPT "remembers" what it said to you previously. A customer service chatbot will serve as a running example throughout this course.

  2. Prompt Engineering: ChatGPT Prompt Engineering for Developers - All about how to make ChatGPT do what you want it to do. We'll explore various example use-cases, such as getting ChatGPT to output structured data (JSON, tables), sentiment analysis, language translation, creative writing, text summarization, and question-answering. We'll explore techniques like chain-of-thought (CoT) prompting, and we'll even look at how to use ChatGPT to build a stock trading system!

  3. Retrieval Augmented Generation (RAG): Learn how to incorporate external data into LLMs. This powerful technique helps mitigate a common problem called "hallucination". It's critical if you have proprietary data (like product info for your company) that your LLM doesn't know about. You'll learn how semantic search / similarity search works, and how to implement it using FAISS (Facebook AI Similarity Search library). Learn how this will allow you to "chat with your data".

  4. Fine-Tuning: Learn how to "train" an LLM on your own dataset so that it behaves the way you want it to. Sometimes prompt engineering and RAG won't cut it.

  5. GPT-4 with Vision: Everything in this course can be done with GPT-4, but what makes GPT-4 (and GPT-4 Turbo) special is its vision capabilities. That is, it can understand images. In this section, we'll explore many of the amazing applications of combined text-image understanding, some of which include automated homework grading, explaining memes and humor, handwriting transcription, web development, game development, and writing product descriptions based on images (business owners - you already know how this will skyrocket your productivity).


Throughout this course, you'll engage in hands-on exercises, real-world applications, and expert guidance to solidify your understanding and mastery of generative AI concepts. Whether you're a seasoned developer, aspiring AI enthusiast, or industry professional, this course offers a transformative experience that will empower you to harness the true potential of AI.

Are you ready to embark on this exhilarating journey into the future of AI? Join us and unlock the endless possibilities of Generative AI today!


Suggested Prerequisites:

  • Python coding

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Instructor Details

Lazy Programmer Inc.

The Lazy Programmer is a seasoned online educator with an unwavering passion for sharing knowledge. With over 10 years of experience, he has revolutionized the field of data science and machine learning by captivating audiences worldwide through his comprehensive courses and tutorials.


Equipped with a multidisciplinary background, the Lazy Programmer holds a remarkable duo of master's degrees. His first foray into academia led him to pursue computer engineering, with a specialized focus on machine learning and pattern recognition. Undeterred by boundaries, he then ventured into the realm of statistics, exploring its applications in financial engineering.


Recognized as a trailblazer in his field, the Lazy Programmer quickly embraced the power of deep learning when it was still in its infancy. As one of the pioneers, he fearlessly embarked on instructing one of the first-ever online courses on deep learning, catapulting him to the forefront of the industry.


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Reviews

4.7

1,048 ratings on Udemy

Select a bar to show only those reviews.Select the bar again to show every rating.

By Alex Garcia on 1/29/2026

This course has been great and I love the depths of knowledge. Theres small tidbits like the comparisons to NLP that he makes(dont need the knowledge for this course). This course really dives deeper than just using LLMs. Its been so great

By Abigail Bossman on 7/20/2025

So far it's great. Maybe it's just that this format works for me better than reading. As I follow along with the videos, the somewhat quick pace and learning by example forces me to bang out code and get the hang of it quickly. With books, it's easier for me to gloss over details when it comes to coding. Thanks, Lazy Programmer!

By Fernando Linhares on 4/27/2025

It's a fairly good course but you need to know a minimum Python to get it. The concepts presented are approached from a high level point of view. I used this as an introduction of using AI with Python.

By Jon Segal on 4/25/2025

I'm impressed. A perfect blend of practical instruction and theoretical advice. The pace is quite fast if you're not a programmer but pausing and trying things yourself fixes that.

By Jonah Patterson on 4/1/2025

Coming from a computer science background, I knew most of the course would be straightforward, but there is a lot of valuable information here. Well worth the money and time, Lazy Programmer is keeping the course up to date with the latest GPT releases and he's been very responsive on the Q&A. Definitely got me back into the game as far as AI is concerned. Looking forward to more of Lazy Programmer's courses.

By Alexandru Emanuel Vasile on 3/4/2025

I bought almost a good part of your courses and once I finish them all I shall buy the others. Really love how you explain stuff in depth, even if sometimes it's hard for me to fully understand it. But after a bit of brushing up on prerequisite knowledge, it does make it easier to understand. Keep goind and thanks for the hard work.

By Raul Yanez on 12/14/2024

Excellent coverage of all the material with very specific, pertinent examples. The code provided works perfectly as advertised and the fact that the instructor codes as he explains most of it in real time is invaluable. Another GREAT course, highly recommend it!!!

By Prashant Rastogi on 10/17/2024

Course is a nice starter to get acquainted with the generative AI. So far, I was able to grasp all the concepts taught and also was able to use open AI API with ease.

By Meekey Khati on 8/16/2024

I am glad i took this course which is now helping me in areas that i couldn't pursue before. The instructions are clearly explained without any ambiguity and core areas are covered. The order of courses explained is also very informative for someone starting in this field. I will be enrolling for other courses too from The LazyProgrammer.

By Tom Snell on 5/30/2024

Pretty good match. I had used a chatGPT OpenAI API a couple of times before starting the course.

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Overall Score : 94 / 100