Comment by mattlondon

Very likely. I suspect a key indicator for "bots" is speed of interaction - e.g. if there is "instant" (e.g. every few milliseconds or always 10milliseconds apart etc) clicks and keypresses etc then that looks very unnatural.

I suspect that a LLM would be slower and more irregular as it is processing the page and all that, vs a DOM-selector driven bot that will just machine-gun its way through in milliseconds.

Of course, Cloudflare and Google et al captchas cant see the clicks/keypresses within a given webpage - they'll only get to see the requests.