---
author: "Umesh Malik"
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title: "Umesh Malik's Blog - Attention Mechanisms Articles | Attention Mechanisms Tutorials"
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# Attention Mechanisms

1 article

 [![Cover comparing modern LLM architectures across sixteen single-file PyTorch reference implementations](https://umesh-malik.com/blog/compare-llm-architectures-pytorch-cover.png)

LLM Engineering • Sep 14, 2026

### How to Compare LLM Architectures: 16 Models, One File Each

Compare LLM architectures fast: GQA cuts KV cache 8x on Llama 3 70B, MLA cuts it 93.3% on DeepSeek-V2. One PyTorch repo shows why, file by file.

8 min read

Read more →](https://umesh-malik.com/blog/compare-llm-architectures-pytorch)