Goodfire Finds DNA Model Evo 2 Encodes the Tree of Life as a Curved Activation Manifold

burny_tech · x · 2026-09-22

Goodfire AI's mechanistic interpretability study of Evo 2 — Arc Institute's DNA foundation model trained on genomes across all domains of life — found the model represents the tree of life spanning thousands of species as a curved manifold in its neuronal activations, with geometry that closely matches external reference phylogenies. Evidence that the model internalized an interpretable representation of evolutionary structure rather than memorizing sequences.

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