Codex and GPT-5.6 Sol Ultra outpace Claude on a Raccoon Heist demo
Simon Willison re‑runs the same “Raccoon Heist” prompt he used with Claude Fable 5, this time on OpenAI Codex Desktop in GPT‑5.6 Sol Ultra mode. The side‑by‑side results show noticeably cleaner code, smarter design choices and a faster build cycle, highlighting how agentic reasoning boosts AI‑assisted development.