Justyn Berk
Justyn Berk @justyn.ai · 250,000+ followers
Free Guide

Why I Switched to Codex

The no-fluff guide to the most powerful AI dev app right now. Not a Claude Code takedown, a real upgrade to your entire workflow.

5 Reasons It's Different 40-Minute Real Build 10-Minute Setup Honest Comparison
See exactly why Codex is a true super app, not just ChatGPT with a nicer UI
Steal the /goal command, Skills, and in-app browser plays that turn one-shot prompts into compounding leverage
Get the honest Claude Code vs Codex breakdown so you stop picking sides and start picking the right tool for the job
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Common Questions
Is this a Claude Code takedown?
No. I still use Claude Code every day for planning and exploration. The guide is about why Codex earned a permanent spot in my stack alongside it, and the specific jobs where it leaves every other tool behind.
What's actually different about Codex vs ChatGPT?
Short version: ChatGPT is a brain in a jar, Codex is the same brain with hands. It can touch your local files, drive a real browser, run terminal commands, hit any API, and generate images with GPT Image 2, all in one app. The guide breaks down all five reasons it changes how you work.
Do I need to be technical to use this?
No. The guide includes a 10-minute getting-started checklist and a real 40-minute build (YouTube comment dashboard, deployed live to Vercel) that uses one-line prompts. If you can describe what you want, Codex can usually build it.
Is this actually free?
Yes. 100% free. No credit card, no upsell. You just need a Codex account (any ChatGPT Plus or Pro subscription) to follow along.
Ready to upgrade your setup?

Grab the guide and see why Codex earned a permanent spot in my stack.