Sky sphere representation in language models

Abstract:We analyze whether language models of size ~100B have a representation of the night sky map that is decodable from their residual stream. We find that most of the considered open-source models do have such a representation, and it often even surfaces to the top principal components on prompts that ask questions like ``what is close to this object in the night sky''. In all but one model this representation showed significant scores in LOO testing, containing up to 65-85% of variance ($R^2$-score) and having median angular error down to $12^\circ-21^\circ$. We verify that our representation is not a simple leak from a correlated flat representation. To our knowledge, this representation is the first example of a curved high-dimensional irreducible feature manifold. Codes used in the paper are published at this https URL

Machine Learning (cs.LG)

arXiv:2607.27092 [cs.LG]

(or arXiv:2607.27092v1 [cs.LG] for this version)

https://doi.org/10.48550/arXiv.2607.27092 Focus to learn more arXiv-issued DOI via DataCite (pending registration)

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