Gestalt: a meta-foundation model for astronomy
The Platonic Representation Hypothesis predicts that sufficiently scaled foundation models converge on a shared representation of the world. As each non-converged model gives a noisy view of a common structure when passed the same input, we ask whether we can combine models into a representation that outperforms its individual components. We test this on galaxies: we embed images via a basket of 22 frozen foundation models from eight families, whiten each view, and take a randomised SVD of the embedding concatenation. The resulting 1024-dimensional embedding outperforms every basket member on 19/21 of our tested metrics for physical property and galaxy morphology estimation for HSC, JWST,...
| Authors | Michael J. Smith, Shashwat Sourav |
|---|---|
| Primary category | astro-ph.IM |
| Published | 29 September 2026 |
| Last updated at source | 29 September 2026 |
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