The most interesting & ambitious things built on GPT-6 Astra (so far)
GPT-6 Astra shipped. I hunted it on Product Hunt. Then the timeline did what timelines do when a model this good lands.
People started building ridiculous things. Playable games. Three.js worlds. Blender houses. Unreal civilizations. PostHog dashboards that assemble themselves across three browser tabs.
I hunted the launch - details in I hunted GPT-6 Astra. It went #1 on Product Hunt. This post is the other half: a curated compilation of the most interesting and ambitious builds I saw in the first couple days.
Not ranked. Grouped by theme so you can skim. Links go to the original posts (and a couple official OpenAI showcases).
Live directory version if you prefer filters: built-on-astra-kp.netlify.app
Games
I'm in disbelief right now. 12 months ago I remember making flappy bird with AI in 2-3 prompts and being blown away.
— Riley Brown (@rileybrown) September 4, 2026
Now it can make a call of duty game. One that's actually fun… I played for like 2 hours.
Astra (GPT-6) is here!!!
— Matthew Berman (@MatthewBerman) September 4, 2026
I've had early access and tested it like crazy with the wildest demos.
GPT-6 Astra is cracked at making games.
— Shikhar (@xikhar) September 6, 2026
This runs in the browser with three.js. It even modeled the cars in Blender.
The next GTA will be made by AI.
GPT-6 Astra is world class at Blender and 3 dimensional reasoning. This was a 1-shot.
— Theo (@theo) September 4, 2026
Void Explorer / Sunwake / Hollowflux (OpenAI Developers) - Official showcase: Void Explorer (Three.js WebGPU), Sunwake ocean boat, Hollowflux 2D RPG.
Three.js & WebGL
GPT-6 Astra is cracked at making games.
— Shikhar (@xikhar) September 6, 2026
This runs in the browser with three.js. It even modeled the cars in Blender.
The next GTA will be made by AI.
Building games with Astra (Three.js + WebGPU) (OpenAI Developers) - TypeScript/Vite, Three.js node materials / TSL, terrain workers.
3D / Blender / Unreal
My first holy shit moment with GPT-6 Astra:
— Matt Shumer (@mattshumer_) September 4, 2026
I asked it to create a world in Unreal…
Astra is very good at 3D modeling, and I can't wait for all of you to experience it.
— Dimillian (@dimillian) September 4, 2026
GPT-6 Astra is a beast. Give it a Zillow listing. It can 3D model the house based on the photos.
— Yunfan Ye (@realYunfanYe) September 4, 2026
GPT-6 Astra just vibe-coded the Oval Office in 3D.
— Higgsfield (@higgsfield_ai) September 4, 2026
We described the set design…
So how good really is GPT-6 Astra at 3D modeling? I took an old drawing of a steam train…
— Tom Krcha (@tomkrcha) September 4, 2026
GPT-6 Astra models a house in Blender and turns it into a walkable scene in Unreal Engine 5.
— AngryTom (@AngryTomtweets) September 4, 2026
Hey Astra, make me a Mac app. It should render a 3D iPod that you'll build in Blender…
— Stefano (@skirano) September 4, 2026
Architecture & Art
Solace house + HELIOS + Shipyard + Giverny (OpenAI Developers) - Official archviz: cinematic Blender house, UE5 walkthrough, Dyson sphere, cruiser, Monet garden.
Agents & Computer Use
This is GPT-6 Astra.
— OpenAI (@OpenAI) September 4, 2026
Anything you can do on a computer, Astra can do for you. Fast.
GPT-6 Astra is here (and I'm obsessed)
— Claire Vo (@clairevo) September 4, 2026
I was able to test this model early…
GPT-6 Astra is our best model yet for computer use, software engineering, and visual understanding.
— OpenAI Developers (@OpenAIDevs) September 4, 2026
Analytics & Dashboards
Holy Sh*t! GPT-6-Astra just built my product analytics dashboards in the most superhuman way possible!
— Akarsh G (@akarsh_ghale) September 6, 2026
Apps & Tools
Hey Astra, make me a Mac app. It should render a 3D iPod that you'll build in Blender…
— Stefano (@skirano) September 4, 2026
What I'm taking away
The jump isn't "AI can write code." We already knew that.
It's that Astra closes the loop - play the thing, complain about one detail, get a new build, play again. Riley Brown's COD-style demo is the clearest version of that. Akarsh's PostHog dashboards are the work version of the same idea.
If you're building in public right now and you're not stress-testing Astra on the hardest thing on your plate.. you're leaving free momentum on the table.
Got a wild Astra build I missed? Reply on @thisiskp_ and I'll add it.