Uploaded July 2026 | Updated September 2026, 3 weeks ago
Learn how to use OpenAI ChatGPT Desktop App step by step — build a full web app using the ChatGPT desktop workspace, without writing the code yourself.
🚀 My AI coding courses, live Q&A, weekly builder challenges, direct access to me, and a serious builder community:
skool.com/agentic-labs
🎁 Get the free 7-Day AI Builder Challenge + resources for this video: skool.com/leonvanzyl
Disclosure: This video is not sponsored. Some links are affiliate links, which means I may earn a small commission at no extra cost to you.
In this video, I show you how to build an AI native fitness app from scratch inside the OpenAI Desktop desktop app, powered by a free local model running on Ollama. You'll learn how to set up and navigate the Codex workspace, plan properly using plan mode, the grill-me skill, and feature files, and build plus test a real app end to end, all running multiple agents in a single visual workspace.
===========================
Resources Mentioned
===========================
📦 Source code, prompts, workflows + peer discussion:
skool.com/leonvanzyl
- OpenAI Codex (download): openai.com/codex
- Ollama (run local models): ollama.com
- Qwen 3.6 model on Ollama: ollama.com/library/qwen3.6
- grill-me skill (skills.sh): https://skills.sh
- Vercel AI SDK: https://ai-sdk.dev
===========================
Watch This Next
===========================
===========================
Go Deeper with Agentic Labs
===========================
🧪 AI coding courses, live Q&A, weekly builder challenges, direct access to me, and a serious builder community:
skool.com/agentic-labs
===========================
Subscribe / Connect
===========================
Subscribe for practical AI building, agentic coding, automation, and real app builds:
youtube.com/@leonvanzyl?sub_confirmation=1
Business & sponsorship enquiries:
leon@cognaitiv.ai
===========================
Question
===========================
What are you building with the Codex app right now?
⏱️ Chapters
0:00 Why Try ChatGPT Desktop App
0:21 Install The ChatGPT App
1:27 Workspaces And Sessions
2:23 ChatGPT App Settings Tour
5:21 Create Project Select Model
6:23 Using Plan Mode
6:55 Plugins And Agent Skills
9:18 Plan App With Grill Me
10:46 Parallel Sessions And Mockups
11:45 Design System And AI SDK
13:06 Save And Split Plan
15:14 Implement With Goal Command
16:32 Pet Command And Testing
17:59 Final Result And Recap
===========================
About This Video
===========================
In this video, I show you how to build a real, working AI app using the OpenAI ChatGPT Desktop app and a free local model on Ollama. This tutorial is for developers, AI builders, and serious no-code/low-code builders who want practical workflows for building real apps, AI agents, automations, and coding systems.
On this channel, I share practical AI engineering and agentic coding workflows using tools like Claude Code, OpenCode, Codex, Cursor, n8n, Next.js, MCP, local AI models, and modern AI development workflows.
#agenticcoding #codex #aicoding
Learn how to use OpenAI ChatGPT Desktop App step by step — build a full web app using the ChatGPT desktop workspace, without writing the code yourself.
🚀 My AI coding courses, live Q&A, weekly builder challenges, direct access to me, and a serious builder community:
skool.com/agentic-labs
🎁 Get the free 7-Day AI Builder Challenge + resources for this video: skool.com/leonvanzyl
Disclosure: This video is not sponsored. Some links are affiliate links, which means I may earn a small commission at no extra cost to you.
In this video, I show you how to build an AI native fitness app from scratch inside the OpenAI Desktop desktop app, powered by a free local model running on Ollama. You'll learn how to set up and navigate the Codex workspace, plan properly using plan mode, the grill-me skill, and feature files, and build plus test a real app end to end, all running multiple agents in a single visual workspace.
===========================
Resources Mentioned
===========================
📦 Source code, prompts, workflows + peer discussion:
skool.com/leonvanzyl
- OpenAI Codex (download): openai.com/codex
- Ollama (run local models): ollama.com
- Qwen 3.6 model on Ollama: ollama.com/library/qwen3.6
- grill-me skill (skills.sh): https://skills.sh
- Vercel AI SDK: https://ai-sdk.dev
===========================
Watch This Next
===========================
===========================
Go Deeper with Agentic Labs
===========================
🧪 AI coding courses, live Q&A, weekly builder challenges, direct access to me, and a serious builder community:
skool.com/agentic-labs
===========================
Subscribe / Connect
===========================
Subscribe for practical AI building, agentic coding, automation, and real app builds:
youtube.com/@leonvanzyl?sub_confirmation=1
Business & sponsorship enquiries:
leon@cognaitiv.ai
===========================
Question
===========================
What are you building with the Codex app right now?
⏱️ Chapters
0:00 Why Try ChatGPT Desktop App
0:21 Install The ChatGPT App
1:27 Workspaces And Sessions
2:23 ChatGPT App Settings Tour
5:21 Create Project Select Model
6:23 Using Plan Mode
6:55 Plugins And Agent Skills
9:18 Plan App With Grill Me
10:46 Parallel Sessions And Mockups
11:45 Design System And AI SDK
13:06 Save And Split Plan
15:14 Implement With Goal Command
16:32 Pet Command And Testing
17:59 Final Result And Recap
===========================
About This Video
===========================
In this video, I show you how to build a real, working AI app using the OpenAI ChatGPT Desktop app and a free local model on Ollama. This tutorial is for developers, AI builders, and serious no-code/low-code builders who want practical workflows for building real apps, AI agents, automations, and coding systems.
On this channel, I share practical AI engineering and agentic coding workflows using tools like Claude Code, OpenCode, Codex, Cursor, n8n, Next.js, MCP, local AI models, and modern AI development workflows.
#agenticcoding #codex #aicoding
