Shepherd's Dog: A Game by the Most Dangerous AI Model

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Summary

Anthropic's supposedly dangerous AI model generated a complete game, 'Shepherd's Dog', in a single 45-minute session, demonstrating unprecedented coding capabilities.

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Cached at: 06/13/26, 02:49 PM

# Shepherd's Dog: A Game by the World's Most Dangerous AI Source: [https://koenvangilst.nl/lab/claude-fable-shepherds-dog](https://koenvangilst.nl/lab/claude-fable-shepherds-dog) A few days ago, Anthropic released the model that was supposedly too dangerous for the world to see\. I wanted to give it a try using my personal benchmark: can it build a game idea I've had for years, in a single shot? The model started with a very long reasoning session, and after 45 minutes and more than €20 worth of tokens \(\!\), it happily reported that "Shepherd's Dog is complete — a single 2,319 line index\.html with zero dependencies\." You can watch the video below or give the game a[try](https://vnglst.github.io/when-ai-fails/shepards-dog/claude-fable-5/index.html)It's really fun and exactly how I imagined it\. For me this is the first time an AI model is able to create this for me in one go: - Play the game here:[vnglst\.github\.io/when\-ai\-fails/shepards\-dog/claude\-fable\-5/index\.html](https://vnglst.github.io/when-ai-fails/shepards-dog/claude-fable-5/index.html) - Other attempts with earlier models:[github\.com/vnglst/when\-ai\-fails/blob/main/shepards\-dog/README\.md](https://github.com/vnglst/when-ai-fails/blob/main/shepards-dog/README.md)

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