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Interleaving images, text and geometry in one token stream, Psi-0.6 scored 49.7 percent zero-shot on multi-view spatial reasoning

AspireAI community · arXiv (Aw, Kotar, Zhang, Liu, Chen, Kazemian, Venkatesh & Yamins - Stanford NeuroAI Lab)
Most vision-language models treat geometry as something to describe after the fact. Psi-0.6, from Stanford's NeuroAI Lab, instead lets images, text and explicit geometry and motion representations share a single token interface that the model can both generate and read, which the authors call streams of thought. Frozen, it scored 49.7 to 51.3 percent on MindCube across RGB-only, RGB-depth and RGB-camera configurations, and the paper reports it as state of the art among the open-source generalist VLMs and spatial specialists it compared against; after MindCube fine-tuning it reached 68.7 percent RGB-only and 76.3 percent RGB+camera on the held-out Tiny test split, which still trails GeoThinker's 83.0 percent. On text-to-motion prediction its best configuration reached 56.4 percent accuracy against 16.4 percent for the strongest image-editing baseline, with rEPE_move of 0.454 versus 0.915 for FOFPred. The honest caveat: the paper says model and code will be released to the lab's Hugging Face and GitHub organisations, and the 0.6 checkpoint is not there yet, though an earlier psi0_5 is.
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