My Fable example is not nearly as cool but still (to me) impressive.

Last year, I would occasionally test the latest models by vibe-coding in-browser music generators using only HTML, CSS, and JS. Here’s one made in July by Gemini:

https://gally.net/temp/20250701synthesizer-gemini2/index.htm...

And one made in September by Claude:

https://gally.net/temp/20250917rhythmdrone/index.html

With Fable, I was able to one-shot something much more sophisticated:

https://gally.net/temp/20260610-fable-synthesizer/index.html

It’s still a long way from creating music I would want to listen to, though.