Codex + GPT-5.6 Sol Ultra builds Raccoon Heist game

Simon Willison posed the same one-shot prompt to Codex Desktop running GPT-5.6 Sol Ultra, which produced a museum-heist game with sub-agents in 52 minutes. The initial version had a bug with giant eyeballs, fixed via two prompts.
1 source
Daily brief
Get tomorrow's AI brief in your inbox
More stories today
- Z.ai CEO Jie Tang: GLM 5.3 gains come from RL, not parameter count
- New tool adds 14 skills to Claude Code and Cursor for Markdown diagrams
- Tool turns Claude into a team of AI employees on your Mac
- GOP panics over Big Tech ties as Trump shifts on AI regulation
- Ethan Mollick: Claude's skill creator beats ChatGPT for reusable skills