SYNTH team's jspace analysis: Baguettotron layer topology radically differs from Gemma-270m

voooooogel · x · 2026-10-17

In an analysis left out of the SYNTH paper, Dorialexander shared jspace results for Baguettotron (350M, 80L): its commit zone topology differs radically from Gemma-3-270m (17L blocky reference), with very high feature connectivity. CKA heatmaps show a crystallization median around layer 60 and a smoother progression versus Gemma's blocky layering. The authors tentatively attribute this to synth pretraining rather than architecture depth.

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