Claude Fable 5 built a small web game in one shot
Anthropic's was used to test whether an AI model could build a long-planned game idea from a single request. The model spent a long time reasoning before producing the result.
The run took 45 minutes and used more than €20 worth of tokens. The finished output was one 2,319-line file with no .
The game is called Shepherd's Dog, and it is available to play in a browser. Earlier model attempts did not produce the desired result in one pass, but this version came close to the intended idea on the first try.
Key points
- turned a game idea into a working from one request.
- The run took 45 minutes and cost more than €20 in tokens.
- The output was a single 2,319-line file.
- The game had no , so it could run as a simple web page.
- Earlier AI model attempts did not reach the same one-shot result.