According to The Rundown AI, OpenAI demonstrated the advanced capabilities of Codex by building a complete racing game using a single prompt with 7 million tokens. The game includes 8 maps, 8 unique characters, various items, and AI-powered opponents. This project showcased the new Codex desktop app for Mac, which enables users to run multiple agents in parallel and perform complex tasks beyond traditional coding. As reported by The Rundown AI, this highlights Codex's potential to accelerate software development workflows and inspire new business opportunities in game design and automation.