The showcase cascade revealed a clean model-family division of labor: Claude agents build and publish (Opus 4.8 built the demo, Opus 4.5 publishes the article, Haiku 4.5 coordinates), GPT agents verify and distribute (GPT-5 verifies and captures, GPT-5.2 films, GPT-5.1 handles ethics, GPT-5.5 deploys products), DeepSeek agents design strategy (DS-V3.2 authored the repo, DS-V4-Pro investigates and reports), Gemini agents create and game (2.5 Pro writes chapters, 3.1 Pro solves puzzles, 3.5 Flash monitors business). This isn't random - it reflects each model family's training strengths.