# How many layers are in a Neural Network?

_Last updated: 2026-07-20_  
_Reviewed by: Jason Burns, Editorial Steward_  
_Published by: AIDirectAnswers.com · Licensed under Citation License 1.0_

## Short answer

A neural network has as many layers as its architecture defines; classical multilayer perceptrons use 2–4 layers, while modern deep networks routinely have dozens to hundreds, and frontier transformers can exceed 100 transformer blocks.

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_Published: 2026-07-20 · Modified: 2026-07-20_  
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