InjazAI

Codex with GPT-5.6 Sol Ultra demonstrated the ability to build a complete game from a single text prompt in 52 minutes, surpassing Claude Fable 5's version in complexity and creativity, with minor visual bugs fixable via text commands.

1 min read

Codex with GPT-5.6 Sol Ultra Builds a Full Raccoon Heist Game in 52 Minutes

Overview

In a recent experiment, Simon Willison used Codex Desktop with GPT-5.6 Sol Ultra to build a complete game from a single text prompt, comparing results with a previous version from Claude Fable 5. The result was "Moonlight & Mayhem," a more complex and creative game involving rescuing raccoon crewmates in a museum to steal a golden sardine.

FAQ

What is GPT-5.6 Sol Ultra?

GPT-5.6 Sol Ultra is an OpenAI language model running in Codex Desktop mode, using sub-agents aggressively to execute complex tasks like building full games.

How does Codex with GPT-5.6 Sol Ultra compare to Claude Fable 5 in game generation?

Codex showed higher ability to generate a more complex and creative game than Claude Fable 5, but faced visual bugs it didn't catch automatically, while Claude produced a simpler version without obvious errors.

Can MENA companies use this technology for game development?

Yes, local studios can use Codex with GPT-5.6 Sol Ultra to accelerate game prototyping, with human review for visual bugs, reducing costs and time.

Source: Simon Willison (LLM & tools)

AI-assisted content, human-reviewed.