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Transformer attention.

Follow tokens through a query, key, and value pipeline. Compare attention patterns and inspect a token-to-token matrix.

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Educational simulation: attention patterns and next-token probabilities are illustrative, not outputs from a trained language model.

Quick start

Get hands-on.

Enter up to 10 tokens or choose an example. Select an attention head and toggle the matrix to compare simulated patterns.

What to look for
  • Queries, keys, values, and scaled dot-product attention.
  • Row-wise softmax normalization of attention scores.
  • How different attention heads can emphasize different relationships.