Mar 31, 2026 O(n²) complexity self-attention computational costThe O(n²) Problem: Why Doubling Your Context Window Quadruples the CostSelf-attention computes all pairwise interactions between tokens. For n tokens, that's n² computations. Here's the full mathematical derivation.
Mar 31, 2026 transformer attention mechanism query key valueHow the Transformer Attention Mechanism Actually Works (No Math Required)The attention mechanism is the beating heart of every LLM. Here's how it decides which parts of your conversation matter most — explained with analogies before equations.
