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Ryan Lopopolo: observation

7 Apr 2026 Latent Space Extreme Harness Engineering for Token Billionaires: 1M LOC, 1B toks/day, 0% human code, 0% human review — Ryan Lopopolo, OpenAI Frontier & Symphony

“This has been my experience with platform teams in the past, where you have an envelope of acceptable build times and you let it go up to breach and then you spend two, three weeks to bring it back down to the lower end of the average low bed stop.”

— Ryan Lopopolo

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Everything needed to verify it.

Speaker
Ryan Lopopolo
Attribution
Verified speaker
Claim type
observation
Recorded
7 Apr 2026
Publisher
Latent Space

Transcript context

…It’s almost like you’re, it’s like a ratchet. It’s like you’re forcing build time discipline, because if you don’t, it’ll just grow and grow. That’s right. And you mentioned that my current, like the software I work on currently is at 12 minutes. It sucks. This has been my experience with platform teams in the past, where you have an envelope of acceptable build times and you let it go up to breach and then you spend two, three weeks to bring it back down to the lower end of the average low bed stop. But because tokens are so cheap Yeah. And we’re so insanely parallel with the model, we can just constantly be gardening this thing to make sure that we maintain these in variants, which means. There’s way less dispersion in the code and the SDLC, which means we can simplify in a way and rely on a lot more in variance as we write the software. Lovely. You mentioned in your article, like humans became the bottleneck, right? You kicked off as a team of three people. You’re putting out a million line of code, like 1500 prs, basically. What’s the mindset there? So as much as code is disposable, you’re doing a lot of review. A lot [00:08:00] of the article talks about how you wanna rephrase everything is prompting everything, is what the agent can’t see. It’s kind of garbage, right? You shouldn’t have it in there. So what’s like the high level of how you went about building it, and then how you address okay, humans are just PR review. Like how is human in the loop for this?…

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