Evidence receipt / uncertainty
Published · transcript-backedLenny Rachitsky: uncertainty
14 Dec 2025 Lenny's Podcast Why humans are AI’s biggest bottleneck (and what’s coming in 2026) | Alexander Embiricos (OpenAI Codex Product Lead)
“Built, you said, in 28 days and I don't know, 10 days, 18 days just to get the core of it working.”
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Everything needed to verify it.
- Speaker
- Lenny Rachitsky
- Attribution
- Verified speaker
- Claim type
- uncertainty
- Recorded
- 14 Dec 2025
- Publisher
- Lenny's Podcast
Transcript context
…Yeah, so that's a really fun example of acceleration. And then Atlas was the other one that I think Ben did a podcast, the engine lead on Atlas, sharing a little bit about how we built there. Atlas is actually... I mean, it's a browser, and building a browser is really hard. So we had to build a lot of difficult systems in order to do that. And basically we got to the point where that team has a ton of power users of Codex right now, and it got to the point they where basically... We were talking to them about it, because a lot of those engineers are people I used to work with before at my startup. And so they'd say, "Before this would've taken us two to three weeks for two to three engineers, and now it's like one engineer, one week." So massive acceleration there as well. And what's quite cool is that we shipped Atlas on Mac first, but now we're working on the Windows version. So the team now is ramping up on Windows and they're helping us make Codex better on Windows too, which is admittedly earlier, just the model we shipped last week is the first model that natively understands PowerShell. So PowerShell being the native Shell language on Windows. So yeah, it's been really awesome to see the whole company getting accelerated by Codex from... And most obviously, also research and improving how quickly we train models and how well we do it. And then even design, as we talked about, and marketing. Actually, we're at this point now where my product marketer is often also making string changes just directly from Slack or updating docs directly from Slack. These are amazing examples. You guys are living at the bleeding edge of what is possible, and this is how other companies are going to work. Just shipping, again, what became the number one app in the app store and just beloved all over the... It just took over, I don't know, the world for at least a week. Built, you said, in 28 days and I don't know, 10 days, 18 days just to get the core of it working. Yeah, so it was like 18 days we had a thing that employees were playing with, and then 10 days later we were out.…
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