Momentum Streams for Optimizer-Inspired Transformers
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Computer Science > Machine Learning
Title:Momentum Streams for Optimizer-Inspired Transformers
Abstract:The residual update of a pre-norm Transformer layer admits an interpretation as one step of a first-order optimizer acting on a surrogate token energy, wherein the attention and MLP sublayers function as gradient oracles. Based on this observation, we build a family of optimizer-inspired Transformers (triple-momentum, Adam/AdamW, Muon, SOAP) and compare them under matched compute. In our main pretraining experiment, the triple-momentum TMMFormer achieves the lowest validation loss, outperforming the vanilla Transformer and prior architectural variants. A controlled ablation and supporting theory show that momentum, not preconditioning, is the main source of the gain. We further show that TMMFormer and other momentum-based designs reach flatter minima than the vanilla Transformer, which leads to less forgetting and better generalization.
| Subjects: | Machine Learning (cs.LG); Artificial Intelligence (cs.AI); Computation and Language (cs.CL) |
| Cite as: | arXiv:2605.24425 [cs.LG] |
| (or arXiv:2605.24425v1 [cs.LG] for this version) | |
| https://doi.org/10.48550/arXiv.2605.24425
arXiv-issued DOI via DataCite (pending registration)
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