Part 8 — Token-by-Token: Why AI Generates Text One Word at a Time (And Why It Costs 4x More)

THE HIDDEN TAX OF AI Output Is King INPUT COST $2.50 Per 1M Tokens (GPT-4o) 4x MORE OUTPUT COST $10.00 Per 1M Tokens (GPT-4o) The reason? The AI writes very slowly on the inside — one token at a time. Last article we saw the Transformer architecture. Today we watch it in action during live generation — and discover why the output side is 4x more expensive. Here's something that surprises most developers when they first hear it: ChatGPT doesn't think its answer in advance and then display it. It