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Featured image for article: The O(n²) Problem: Why Doubling Your Context Window Quadruples the Cost
Mar 31, 2026 O(n²) complexity self-attention computational cost transformer architecture scaling

The O(n²) Problem: Why Doubling Your Context Window Quadruples the Cost

Self-attention computes all pairwise interactions between tokens. For n tokens, that's n² computations. Here's the full mathematical derivation.