Anthropic’s Fable 5 can make weirdly fun video games with the click of a button

Anthropic has released Claude Fable 5, the first publicly available version of its closely watched Mythos model. What can Fable actually do? All kinds of things, it turns out.

Ethan Mollick, a notable AI researcher and an associate professor at Wharton, has been playing around with the model and seems to be having a lot of fun.

In his testing, Fable consistently “outperformed basically every other public model I have used by a considerable margin,” Mollick wrote Tuesday on his Substack. He added that it was “capable across many problems and produced some startling results — it would work up to a dozen hours executing on multi-page specifications.”

Perhaps most strikingly, Mollick used Fable to create a variety of video games — all of which were generated via “one initial prompt” in Claude Code, the researcher says.

Among these, Snakeis exactly what it sounds like. You’re a Pac-Man-like...

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