A macOS simulator written in 75 minutes. An old drawing of a steam train rebuilt in Blender as 3,295 editable objects. A game that took one prompt. We are collecting the best of it here, each in the builder's own words. Nobody in these bylines is on eChai, and every post links back to where it was written.
Pietro Schirano
12h
"Hey Astra, make me a Mac app. It should render a 3D iPod that you'll build in Blender, then using the original iPod UI and interactions I want to be able to visualize all my Codex threads on it."
15 minutes later: Boom.
What's even in this model? What time we're living in!??
Paul Solt
15h
GPT-6 Astra built this iOS app in 13m 3s using my AppCreator skill.
I want to see my weekly mileage, not averages. Apple Health app doesn't make it easy.
So I gave this prompt to Astra, and this is the result.
No other model has made it work like this from one prompt.
@OpenAI @OpenAIDevs
Max Weinbach, of Creative Strategies. The thing he describes is live at the link, so this is one of the few Astra demos you can open and use rather than watch.
Max Weinbach
15h
Another fun demo of Astra, I realized like 3.5 hours ago I didn't have a cool enough demo
In 75 minutes, I gave it the same simulate macOS 27 prompt. It's BY FAR the best output I've seen. If you log in, it also has cloud sync and working apps
