DeepSeek V4.1 Flash 1017 vs GPT-6 Astra: Same Three.js Prompt, 50% Lower Cost

Key Info

SiliconFlow compared DeepSeek V4.1 Flash 1017 against GPT-6 Astra by giving both models the identical prompt to build an interactive Three.js 3D world, reporting nearly the same quality, if not better, at over 50% lower cost than Astra.

Highlights

• Both models were tasked with generating the same single-file Three.js/WebGL "FLOATING WORLD" scene: a cinematic Eastern-fantasy floating island with procedural geometry and textures only.
• The prompt forbids external 3D assets, images, paid APIs, placeholders and TODOs, and requires graceful handling of missing WebGL, resizing and mobile layouts.
• SiliconFlow claims output quality is nearly on par with GPT-6 Astra, or better, while costing over 50% less.
• The full prompt was shared publicly, allowing others to reproduce the side-by-side comparison.