# Claude Fable's Shepherd's Dog > Source: > Published: 2026-06-12 00:00:00+00:00 # Claude Fable's Shepherd's Dog June 12, 2026 1 min read A few days ago Anthropic released the model that was supposedly too dangerous for the world to see. I wanted to give the model a try and used my personal benchmark: Can it create an idea for a game that I've had for years in one shot. The model started with a -- very -- long reasoning session and after 45 minutes and more than 20 euros worth of tokens (!) it happily reported that "Shepherd's Dog is complete — a single 1,296-line index.html with zero dependencies." You can see the result in the video below or give the game a [try](https://github.com/vnglst/when-ai-fails/blob/main/shepards-dog/README.md) 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: - 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)