i love the "select all motorcycles" one on a picture that's all motorcycle.

and then it fails.

I don't need to use any website this badly...

They might be generated for the purpose of creating adversarial images that appear relatively normal to a human but confuse AI image recognition. You can see an additional layer of weird patterns on top of them too.

IMO this is not a particularly annoying captcha though. I've had some where the text instructions are so indirect and strangely phrased that it's not even clear what you're supposed to do.

I'm not gonna lie, I see some effectiveness considering the ai summary called the mouse a jungle cat.

Edit: op needs glasses and it wasn't an ai summary.

Hcaptcha has been like that for a while now, it's terrible

I've actually been fine with this one, I can always pass it just fine. Google often has me re-do them or do multiple. Cloudflare doesn't let me in if my network is too slow (say throttled to 256kbps). But anyway, a lot of websites are broken with CF because while I can get to the website after passing captcha, their CDN still blocks me anyway. So I just get a partial website with no images where certain things don't work.

the worst imo is the one where they ask you to select which stack has the given number of rocks; you have to go through a bunch of images to find that stack.

then, you have to do it like five+ times, and if you fail you have to restart.

Conceptually these are really interesting and I don't really know enough about how LLMs work to know how to feel about them. It's a neat approach to avoiding the issue where LLMs are really good at pattern recognition and a use-case where on-demand image generation actually makes sense to me. It just all comes down to whether or not bots can easily solve it.

I enjoy the absurdity of these