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Backprop Alternative: Augmented Lagrangian Predictive Coding(pub.sakana.ai)
30 points by guld 6 hours ago | 5 comments

https://arxiv.org/abs/2605.31022

https://github.com/SakanaAI/pc-alm

cs702 2 hours ago | parent | next [-]

~85% accuracy on MNIST. Sigh.

How does it do on CIFAR-10, or even better, ImageNet?

Interesting research, not sure it's a backprop alternative.

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EDIT: accuracy on MNIST is not ~90%. It's ~85%.

Lerc an hour ago | parent | next [-]

It might be beneficial while not being optimal on its own.

The obvious example is if it has different behaviour around local minima, it could be an altenate pathway out.

I have often wondered if doing training with radically different aproaches for the first few iterarions would avoid any method specific artifacts before the weights had time to denoise.

bz_bz_bz 2 hours ago | parent | prev [-]

Their image classification benchmarks include both: https://pub.sakana.ai/pc-alm/assets/figures/benchmark_accura...

cs702 18 minutes ago | parent [-]

~74% on CIFAR-10. Still a far cry from backprop.

I didn't see ImageNet. TinyImageNet is something else.

guld 6 hours ago | parent | prev [-]

New paper by Sakana.ai [1]

[1]: https://arxiv.org/abs/2605.31022