by Amit Shekhar · 29 May 2026
Self Attention in Transformers
Self Attention in Transformers. We will understand what it is, how it works step by step, and why it is the heart of modern Large Language Models like BERT and GPT.
Read on Outcome School ↗then come back to lock it in
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What this article covers
- What is Self Attention?
- Why do we need Self Attention?
- Query, Key, and Value vectors
- Step-by-step working of Self Attention
- A simple example walk-through
- Why Self Attention works so well
- Multi-Head Self Attention
- Where Self Attention is used
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