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Developer Uses GPT-6 Astra to Build a Browser Game With Blender Cars

September 10, 2026 at 00:18 EDT

Software Dev & Coding
Foundation Models
AI Agents

A developer using OpenAI's GPT-6 Astra has produced a browser-based 3D game rendered with Three.js and featuring car assets modeled in Blender, a compact demonstration of how far an AI coding agent can carry a game workflow. The result is a prototype, not evidence that a full Grand Theft Auto-scale production can be generated end to end.

SEPTEMBER 2026 · OPENAI

From Blender cars to a browser game

GPT-6 Astra connects 3D asset work in Blender with an interactive Three.js scene that runs in a browser. The result is a revealing prototype, not a finished commercial game.

The capability behind the demo

The reported OSWorld 2.0 comparison is separate from the game demo, but it shows the computer-use capability behind this kind of workflow.

72.6%

GPT-6 Astra

65.7%

GPT-5.6 Sol

Rounded blocks show the relative scale; the labels carry the reported values.

A model with room for long builds

1.05M

Context window

128K

Maximum output

$10 / $50

Input / output per 1M tokens

The build loop

Direct the brief

→

Build the asset

→

Render the scene

→

Test and revise

Prototype speed meets production limits

What the demo shows

Browser-based 3D output, Blender asset work, and an iterative path from direction to a working scene.

What remains open

GTA-scale production, consistent performance, and the provenance and rights of every asset are not established.

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