This is a bit of fun. Cappella software makes an app, “tonica fugata”, that supposedly creates counterpoint, fugues, and harmonizes the style of Bach, etc.
There’s a ‘Turing Test’ on the site (in German, but easy enough to navigate). Guess whether the chorale is by Bach or by the machine!
The one they posted on the main page was pretty lame in spots. The bass line at the end of bar 6 reminds me of barbershop quartet style. Still impressive, though.
8 out of 10 although one of them I nearly clicked the alternate and I debated. It was a very interesting test. For me it was the passing tones that gave it away. (Or frequently, lack thereof.)