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Andrew Ambrosino leads the Codex desktop app team at OpenAI and states his…

2026-06-28 · 18:12 UTC ·@jxnlco ·1 min read

Brief

Andrew Ambrosino leads OpenAI’s Codex desktop app and aims to build “the best desktop app that has ever existed.” Codex grew 6× since February 2026 to over 5 million weekly active users and is used by nearly all OpenAI employees. In a June 28 interview he covers PM “zone defense,” design limits of AI, timing effects from model updates, and Codex+ChatGPT plans.

Why it matters

Andrew Ambrosino leads the Codex desktop app team at OpenAI and states his mission is to build “the best desktop app that has ever existed, full stop.”

Key details

  • Codex usage has grown 6× since February 2026, reaching over 5 million weekly active users; nearly 100% of OpenAI employees use the Codex app regularly (not just engineers).
  • In a Lenny Rachitsky interview (published 2026-06-28), Ambrosino explains OpenAI PMs' “zone defense” model, argues why AI is bad at design, says the product would have flopped if shipped in November instead of February due to a model change, and outlines his view of “taste,” workflows, and Codex+ChatGPT integration.
Source evidence

This is the hot codex guy?!

Lenny Rachitsky (@lennysan)

Andrew Ambrosino (@ajambrosino) leads the team behind the Codex desktop app at @OpenAI. Codex usage has 6x'd since February, reaching over 5M weekly active users, and nearly 100% of OpenAI's employees use the Codex app regularly (and not just the engineers).

Andrew's personal mission is to build "the best desktop app that has ever existed, full stop." If you've used the Codex app lately, you know he's not far off from that goal.

In our in-depth conversation, we discuss:
🔸 The "zone defense" model of how PMs at OpenAI operate
🔸 Why AI is so bad at design
🔸 Why Andrew thinks the Codex app would have flopped if they'd shipped it in November instead of February (same product—only the model changed)
🔸 What “taste” really means as a professional skill
🔸 How Andrew uses Codex to run his workflows
🔸 His vision for Codex + ChatGPT

Listen now 👇
piped.video/P3KDebPTUrw

Link

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

Andrew Ambrosino leads development of the Codex desktop app at Open...
youtube.com

— https://nitter.net/lennysan/status/2071294324999115057#m