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.”

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In our in-depth conversation, we discuss:

Why AI has completely flipped the product development process
What “taste” really means as a professional skill, and why it is emerging as the most valuable capability in an AI-first workplace
Why Andrew believes the Codex app would have failed if they launched it last November (vs. in February)
The “zone defense” model for how product managers at OpenAI operate when everyone can build anything
How roles are collapsed on Andrew’s team, and why eliminating the concept of roles entirely is a big mistake
How Andrew uses Codex to run his own workflows
The vision for a home base that coordinates work across ChatGPT, Codex, and the tools people already use.

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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

Referenced:

• Codex: chatgpt.com/codex

• The Primal Mark: How the Beginning Shapes the End in the Development of Creative Ideas: https://www.gsb.stanford.edu/faculty-research/publications/primal-mark-how-beginning-shapes-end-development-creative-ideas

• Linear: https://linear.app

• “Taste” is not just taste in aesthetics: https://x.com/thenanyu/status/2067327619897446721

• Linear’s secret to building beloved B2B products | Nan Yu (Head of Product): https://www.lennysnewsletter.com/p/linears-secret-to-building-beloved-b2b-products-nan-yu

• Paul Graham’s website: https://paulgraham.com

• The design process is dead. Here’s what’s replacing it. | Jenny Wen (head of design at Claude): https://www.lennysnewsletter.com/p/the-design-process-is-dead

• The case study factory: https://essays.uxdesign.cc/case-study-factory

• Why humans are AI’s biggest bottleneck (and what’s coming in 2026) | Alexander Embiricos (OpenAI Codex Product Lead): https://www.lennysnewsletter.com/p/why-humans-are-ais-biggest-bottleneck

• OpenClaw: https://openclaw.ai

• OpenClaw: The complete guide to building, training, and living with your personal AI agent: https://www.lennysnewsletter.com/p/openclaw-the-complete-guide-to-building

• From skeptic to true believer: How OpenClaw changed my life | Claire Vo: https://www.lennysnewsletter.com/p/how-openclaw-changed-my-life-claire-vo

• The Codex feature that works while you sleep: https://www.lennysnewsletter.com/p/the-codex-feature-that-works-while

• The AI paradox: More automation, more humans, more work | Dan Shipper: https://www.lennysnewsletter.com/p/the-ai-paradox-dan-shipper

• Atlas: https://chatgpt.com/atlas

• Anthropic: https://www.anthropic.com

• Adobe Premiere: https://www.adobe.com/products/premiere

• The Magic School Bus Rides Again: https://www.netflix.com/title/80108373

Recommended books:

• The Gruffalo: https://www.amazon.com/Gruffalo-Julia-Donaldson/dp/0803730470

• The Big Orange Splot: https://www.amazon.com/Big-Orange-Splot-Manus-Pinkwater/dp/0590445103

Production and marketing by https://penname.co/. For inquiries about sponsoring the podcast, email podcast@lennyrachitsky.com.

Lenny may be an investor in the companies discussed.

In our in-depth conversation, we discuss:

Brought to you by:

Where to find Andrew Ambrosino:

Referenced:

Recommended books:

My biggest takeaways from this conversation:

OpenAI Codex lead on the new shape of product…

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