OpenAI claims not to: https://x.com/aidan_mclau/status/1986255202132042164

Yes, Racoon on a unicycle? Magpie on a pedalo?

Even if not intentionally, it is probably leaking into training sets.

The estimation I did 4 months ago:

> there are approximately 200k common nouns in English, and then we square that, we get 40 billion combinations. At one second per, that's ~1200 years, but then if we parallelize it on a supercomputer that can do 100,000 per second that would only take 3 days. Given that ChatGPT was trained on all of the Internet and every book written, I'm not sure that still seems infeasible.

https://news.ycombinator.com/item?id=45455786