Jordan Sitter rebuild — model comparison

Every build below was made from the same brief, generated from measurements of jordansitter.com and byte-identical across models. Each then iterated against the same automated gate until it passed, stalled, or hit the round cap.

Cost and time are the model's own. Interventions count every retry, transport failure, reasoning cap and truncation — a combination needing a human twice per site is not viable at any price, so it is never folded into the cost.