Moonlight & Mayhem (Raccoon Heist by Codex + GPT-5.6 Sol Ultra)
Moonlight & Mayhem (Raccoon Heist by Codex + GPT-5.6 Sol Ultra) On Wednesday I wrote about One-shotting a Raccoon Heist game using Claude Fable 5 , where I had Claude Fable 5 build a full working game from a premise I generated with GPT-3 and DALL-E four years ago . I decided to pose the exact same prompt to Codex Desktop running GPT-5.6 Sol Ultra - the mode where Sol makes aggressive use of…
On a Wednesday, a Raccoon Heist game was created using Codex Desktop and GPT-5.6 Sol Ultra. The game was generated by posing the same prompt to Codex that was used previously with Claude Fable 5. The game, titled Moonlight & Mayhem, is available on GitHub along with the textures and prompts generated by gpt-image-2. The original game description from GPT-3 had the raccoons robbing banks and stealing art in a backyard setting.
However, GPT-5.6 Sol Ultra transformed the game into a museum heist where the raccoons rescue their crewmates and attempt to steal a golden sardine from its case. Despite the impressive transformation, there was a bug in the final version where each raccoon's eyeball was enlarged to the size of a giant sphere floating above their head.
This bug went unnoticed during Codex's 52-minute development process. The full transcript of the Codex session is available in the repository.
Written by urgent.news from Simon Willison's reporting — not their text. Machine-written — may contain errors; check the original before relying on it.
