GPT-6 Sol and Claude Opus 5.5 have very different design sensibilities. We used the same prompt in OpenDesign to build an ancient Chinese city in 3D. Both nailed the rendering and details, with very different styles. All demos, prompts and the full benchmark coming soon.
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OpenDesign
@OpenDesignHQ
Sep 23
Claude Opus 5.5 is seriously good at building 3D websites. Built during internal OpenDesign testing: lantern-lit streets, shimmering water, and a city you explore as you scroll. We gave GPT-6 Sol the same prompt. See the next post.
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OpenDesign
@OpenDesignHQ
Sep 23
We tested GPT-6 Sol internally in OpenDesign with the same prompt we gave Opus 5.5. A very different take. All the demos and prompts are coming to one page soon.

Sep 23, 2026 · 10:03 AM UTC
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