AI agents build 3D scenes from photos but can't judge their own accuracy

The Decoder · rss · 2026-10-03

The Decoder covers LEGO-Anything, a new approach that turns single photos into editable Blender code for 3D scenes. In the accompanying benchmark, GPT-6 Astra leads with up to 53% reconstruction accuracy. The shared weakness across all tested agents: their self-assessment of geometric accuracy is no better than a coin flip—they can build the scene but can't tell whether they built it right.

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