I Made Claude Code and Codex Build the Same App (RAW RESULTS)

🚀 Become AI Native in 30 days → https://skool.com/ainative I gave Claude Code (Opus 4.6) and Codex (GPT 5.3) the exact same prompt: build a full-stack competitive intelligence app from scratch using Supabase, Firecrawl, and Vercel - then deploy it live. Then I had Gemini Pro 3 judge both codebases to decide who actually won. The results? Not even close. Grab all the files here: https://drive.google.com/drive/folders/1PHw8DMk0q4rt0czxYqF3G4AoVZukzcnc?usp=sharing What to watch next: - How smart can Claude Get at n8n? https://youtu.be/NuVk0-x6imE - How to actually do an AI audit: https://youtu.be/4jie-Chd-1U - Observability & Monitoring: https://youtu.be/u5v8tCjmWb4 Timestamps: 0:17 — The Challenge Setup 0:36 — The Prompt & Rules 1:27 — What We're Building (Rival App) 2:53 — Both AIs Start Planning 5:46 — Codex's Plan Review 6:31 — Atlas Framework Explained 8:39 — Claude's Plan Review 11:09 — GOTCHA Framework Overview (Quick) 13:35 — Atlas Build Framework Explained 15:07 — How to Set This Up Yourself 16:04 — Build Progress Check-In 17:10 — Claude Finishes First 18:28 — Codex Still Struggling 20:00 — Both Apps Deployed — Let's Test 22:26 — Side-by-Side UI Reveal 23:02 — First Functionality Test 24:24 — Gemini Judges the Backend 26:18 — Claude vs Codex: UX & Speed 37:12 — The Verdict -- Work with me: 🤝 Ready to transform your business? Let's talk: https://bit.ly/3TinLo5 🚀 Join my community → https://tinyurl.com/aitransformationacademy 💡 Add me on LinkedIn - https://www.linkedin.com/in/mansel-scheffel/ [ABOUT ME] If you're new here — I'm Mansel. In 2010, I left South Africa with nothing but a laptop and a digital piano. I taught myself IT, broke into cybersecurity in London, and built two consulting businesses - one in cyber, one in cloud - scaling solo to $52K+/month. Today, I run atomicOps, an AI consultancy based in New York where we help mid-market companies turn AI chaos into scalable systems as a transformation partner. I also help aspiring AI builders think like an architect, design agentic AI solutions, and sell them to businesses in my skool community.