OpenAI's coding agent for building and shipping apps.
Justin's pick. On the Episode 001 live he said the entire AI4NTP site, the ads, and the interactive widget were built with Codex.
Genuine substitutes for Codex that we've also run on stage:
Paid; ~$20/mo (stated on the live).
Justin Novak used it in Episode 001 to built the AI4NTP site, ads, and live widget; Alec Saluga used it in Episode 004 to built a prospect list via the SpyFu API in about 10 minutes.
Tools we've also used live that can stand in for Codex: Claude Code.
| Category | AI coding agents |
|---|---|
| Pricing | Paid; ~$20/mo (stated on the live). |
| Free tier | No |
| Used live in | Episode 001 and Episode 004 |
| Operator(s) | Justin Novak, Alec Saluga |
| Website | chatgpt.com/codex |
See tools like Codex set up live, step by step, on AI4NTP, or get hands-on help putting it to work.