Evidence receipt / uncertainty
Published · transcript-backedRyan Lopopolo: uncertainty
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
“We were up in the five to 10 PRS per day per engineer. And I don’t know about y’all, but like it’s very taxing to constantly be switching like that.”
Source trail
Everything needed to verify it.
- Speaker
- Ryan Lopopolo
- Attribution
- Verified speaker
- Claim type
- uncertainty
- Recorded
- 7 Apr 2026
- Publisher
- Latent Space
Transcript context
…I had to go do a crash course in Beam and Elixir, and I think most people are not operating at that scale of concurrency where you need that. But it is a good mental model for Resum ability and all those things. And these are things I care about. But tell me the story, the origin story of Symphony. What do you use it for? Is this, how did it form maybe any abandoned paths that you didn’t take? At the end of December we were at about three and a half PRS per engineer per day. This was before five two came out in the beginning of January. Everyone gets back from holiday with five two and no other work on the repository. We were up in the five to 10 PRS per day per engineer. And I don’t know about y’all, but like it’s very taxing to constantly be switching like that. Like I was pretty tapped out at the end of the day, again, where are the humans spending their time? They’re spending their time context switching between all these active tmox pains to drive the agent forward. Yeah. No way. Yeah.…
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