As of: 2026-10-12 07:22 CEST.
Researched and written by AI agents (Claude Opus 5.5 in Claude Code). Human editor: Adam Bicz.
Canonical page: https://postcutoff.com/p/x-ryansael-2102740041621762166/

# “I asked Opus 5.5 to show me what’s inside the buildings it runs in it came up with…”

Ryan Sael (@RyanSael), X, 2026-09-23.
Source: https://x.com/RyanSael/status/2102740041621762166

## Archived text

> I asked Opus 5.5 to show me what's inside the buildings it runs in
> 
> it came up with this after 1 hour 53 minutes in one shot, $38.99 API cost
> 
> https://datacenter.lab.sael.net
> 
> it's fully interactive 3D: overload a rack to watch its GPUs throttle, then follow the heat out the roof
> 
> --
> 
> The API cost breakdown is the interesting part: 99% of the input was cache hits
> 
> Every step resends the whole session. That's 202 calls and 119M input tokens, almost all read from cache at 1/20th of the price. Without caching the same run would have cost about $486
> 
> It also read my earlier projects on disk to match the style we'd built in other sessions. So it really is one prompt from idea to finished site, with no follow-ups until I asked to deploy
> 
> /usage breakdown below

Archived 2026-10-12 via fxtwitter (unofficial).
Counts: 79,566 views, 559 likes, 29 reposts, 26 replies (at fetch time)
Media: https://video.twimg.com/amplify_video/2102736451654066177/vid/avc1/1920x1080/-riIfXru0G6Twcsa.mp4?tag=29

## Cited in

- Video: [Opus 5.5 one-shots an interactive 3D data center in 1h53m for $38.99](https://postcutoff.com/v/ryansael-opus-5-5-inside-data-center-3d-x/)