# Truncated BPTT

> Source: https://sukruyusufkaya.com/en/glossary/truncated-bptt
> Updated: 2026-05-13T21:00:57.147Z
> Type: glossary
> Category: derin-ogrenme
**TLDR:** A method that makes training more tractable on long sequences by applying backpropagation over a limited window.

<p>Truncated BPTT is used to reduce the cost of full backpropagation through time on very long sequences. The model computes gradients only across a fixed historical window. This improves computational efficiency, but it may weaken learning of very long dependencies. It therefore represents an engineering trade-off between practicality and contextual coverage.</p>