Lenny's Podcast: Product | Career | Growth

OpenAI Codex lead on the new shape of product work | Andrew Ambrosino

June 28, 2026

AI Summary

5 min read

Andrew Ambrosino, product and engineering lead for the Codex app at OpenAI, describes a world where implementation is no longer the bottleneck. Internally, 90% of OpenAI employees—not just engineers—use Codex weekly. The app has grown 6x since January and now has over 5 million weekly active users. But the real story is how this changes the shape of product work itself.

The inversion of product process

The old product playbook assumed implementation was expensive. Teams wrote PRDs, did research, built prototypes—all to de-risk the costly act of building. That assumption is gone. "The implementation is actually not the expensive part anymore," Ambrosino says. "It's dare I say taste."

At OpenAI, this has created a chaotic but fertile environment. People across the company prototype features independently, often producing dozens of uncoordinated attempts at the same idea. The hard work is no longer building the thing—it's deciding which of those 90 attempts has merit, what to fold together, how to frame it, and where it fits in the product. Ambrosino calls this "backwards" from the old process: the expensive part is now curation, not creation.

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What you'll learn

1 (02:33) **The inversion of product work** - Implementation is no longer the expensive part; taste and curation are now the bottleneck
2 (06:33) **Why “PRDs are dead” is both true and false** - The medium must match the stage of thinking
3 (10:24) **What “taste” actually means in practice** - It’s not just aesthetics
4 (12:22) **Why AI is still bad at design** - Three reasons
5 (16:47) **The design process isn’t dead—it’s been freed from old tools** - A nuanced take
6 (21:15) **Role collapse is real, but roles aren’t dead** - How the Codex team actually works
7 (24:19) **Zone defense for product management** - How product people operate in a high-agency, high-taste environment

+ Full timestamped outline available in the app

Show Notes

Andrew Ambrosino leads development of the Codex desktop app at OpenAI. Nearly 100% of OpenAI employees—not just engineers—now use Codex weekly. A lifelong builder with a background spanning engineering, design, product management, and founding companies, he is now responsible for turning the Codex desktop experience into what he calls “the best desktop app that has ever existed, full stop.”

In our in-depth conversation, we discuss:

1. Why AI has completely flipped the product development process

2. What “taste” really means as a professional skill, and why it is emerging as the most valuable capability in an AI-first workplace

3. Why Andrew believes the Codex app would have failed if they launched it last November (vs. in February)

4. The “zone defense” model for how product managers at OpenAI operate when everyone can build anything

5. How roles are collapsed on Andrew’s team, and why eliminating the concept of roles entirely is a big mistake

6. How Andrew uses Codex to run his own workflows

7. The vision for a home base that coordinates work across ChatGPT, Codex, and the tools people already use.

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Episode transcript: https://www.lennysnewsletter.com/p/openais-codex-lead-on-the-new-shape

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Archive of all Lenny's Podcast transcripts: https://www.dropbox.com/scl/fo/yxi4s2w998p1gvtpu4193/AMdNPR8AOw0lMklwtnC0TrQ?rlkey=j06x0nipoti519e0xgm23zsn9&st=ahz0fj11&dl=0

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Where to find Andrew Ambrosino:

• X: https://x.com/ajambrosino

• LinkedIn: https://www.linkedin.com/in/ajambrosino

• Website: https://ambrosino.io

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Where to find Lenny:

• Newsletter: https://www.lennysnewsletter.com

• X: https://twitter.com/lennysan

• LinkedIn: https://www.linkedin.com/in/lennyrachitsky/

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