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Watch Me Build a WILD SaaS With Nano Banana + Codex (Tutorial)

#AI Tools
2025-10-21 16:037 min read

Content Introduction
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In this video, the presenter explores the use of the Codeex extension developed by OpenAI with GPT-5 to create a software as a service (SaaS) tool. The presenter demonstrates how to install the Codeex IDE extension on VS Code or any compatible code editor before building a simple application to test its capabilities. Throughout the video, various features of Codeex are highlighted, including its ability to authenticate through an existing chat account and its integration with a plus membership for enhanced functionality. The video also showcases how to utilize an AI model for generating mobile application icons, culminating in a successful demonstration of creating a logo within a short span of prompts. The presenter expresses excitement about the tool's potential and encourages viewers to engage with the project, inviting feedback and collaboration.

Key Information

  • The speaker discusses using Codeex with GPT-5 to create a software as a service tool.
  • OpenAI has introduced a new Codeex extension for code editors, enabling users to code with advanced models.
  • The speaker plans to review the Codeex IDE extension, install it, and build a simple application to test its capabilities.
  • A subscription to ChatGPT Plus is required to access the Codeex features.
  • The speaker demonstrates how to create an iOS mobile application logo using the functionality provided by the Codeex extension alongside a newly introduced reasoning model.

Timeline Analysis

Content Keywords

Codeex

Codeex is a coding tool that integrates with GPT5 and allows users to create software as a service applications. It offers a seamless coding experience with enhanced reasoning capabilities.

OpenAI

OpenAI has introduced the Codeex extension for coding in various editors, including VS Code, which enhances coding efficiency and enables the use of advanced AI models.

GPT5

GPT5 is touted as one of the best AI coding models available and is integrated into the Codeex tool to improve programming capabilities and user experience.

application development

The video demonstrates the installation of the Codeex IDE extension and the creation of a simple application to showcase its capabilities using AI-driven functionalities.

AI enhancements

Users can enhance their workflows by utilizing the AI capabilities of Codeex, including the ability to generate images and applications rapidly.

Gemini 2.5

Gemini 2.5 is referenced as a model used alongside Codeex for image generation and application logo design, delivering efficient outputs.

subscription model

Users are required to have a plus subscription to access the full capabilities of Codeex, enhancing the overall coding experience with AI.

GitHub

The project will be open-sourced on GitHub for users interested in iterating and building upon the functionalities introduced in the video.

error identification

Codeex can identify errors in coding submissions, helping users troubleshoot and solve coding issues effectively with AI assistance.

User engagement

Viewers are encouraged to interact by leaving comments or subscribing for more content related to software development and AI tools.

Related questions&answers

What is Codeex?

Codeex is a new extension by OpenAI that allows users to code with the new GPT-5 model, which is known for its high reasoning capabilities.

How do I install the Codeex extension?

You can install the Codeex extension by searching for 'Codeex' in the extensions section of your code editor, like VS Code.

Do I need a subscription to use Codeex?

Yes, you need a Plus membership or greater to use Codeex effectively.

What kind of applications can I build with Codeex?

With Codeex, you can build various applications, including generating icons for iOS mobile apps.

What are the main features of the Codeex extension?

The main features include enhanced coding capabilities with GPT-5, a settings tab to manage extensions, and options to add context or documentation for better agentic capabilities.

Can I save my generated images from Codeex?

Yes, you can save the images generated by Codeex by right-clicking on them.

How long does it take to generate an application using Codeex?

Generating an application using Codeex can be quite efficient, often completed in just a few prompts.

Where can I find resources or documentation for Codeex?

Resources and documentation can often be found within the extension settings or through the GitHub repository linked in the video's description.

What should I do if I encounter an error while using Codeex?

You can troubleshoot by reviewing the error messages, providing the necessary documentation, or seeking help through forums or support channels.

Is Codeex suitable for beginners?

Yes, Codeex is designed to assist all users, including beginners, in enhancing their coding projects with AI.

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