There are two general options:

1. Scrape a google search for the question, feed that into OpenAI with the additional prompt of "Given the above information, is the answer to <user prompt> yes or no". Or give the AI a "google" tool and just ask it directly.

2. Same thing, except instead of OpenAI feed it into underpaid people in the global south (i.e. amazon mechanical turk). These people then probably feed it into ChatGPT anyway.

Given there's a free tier, and when you use it it produces very ai-sounding text, I think it's pretty clearly 1.

Also, if you enter a clever enough question, you can get the system prompt, but this is left as an exercise to the reader (this one's somewhat tricky, you have to make an injection that goes through two layers).

My favorite part about the spread of AI/LLM stuff is that it opens up a new kind of reverse engineering. Trying to fetch the system prompt that was used. Trying to deduce the model that was used (there's lots of ways to do this: glitch tokens, slop words, "vibes", etc.)