I Computed Self-Attention by Hand. Every Single Number.

📰 Medium · Deep Learning

Compute self-attention in a transformer by hand to understand its inner workings

advanced Published 24 Apr 2026
Action Steps
  1. Compute the query, key, and value vectors by hand
  2. Apply the self-attention mechanism using these vectors
  3. Calculate the attention weights and scores manually
  4. Normalize the attention weights using softmax
  5. Compute the weighted sum of the value vectors
  6. Visualize the self-attention process to understand its effects
Who Needs to Know This

ML engineers and researchers can benefit from this exercise to deepen their understanding of transformer architecture

Key Insight

💡 Self-attention is a core component of transformer architecture, and computing it by hand can provide valuable insights

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💡 Compute self-attention by hand to grasp transformer internals
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