Browser vendors can't build this.
I am strongly against this, because you cannot accurately detect it. People start to get blamed even more when they actually did not use the AI.
My understanding is that they strongly believe in no false positives, so it's definitely possible to slip something by them but if it marks something as AI, it very likely is.
Who cares what they "believe" (or, more accurately, say they believe). What are the underlying processes that actually guarantee this, and what data supports it?
Their 99.98% accuracy claim[1] makes me doubt that.
Much more importantly, 9/10 dentists agree it's the best.
1: https://arxiv.org/pdf/2501.15654, linked from² https://www.pangram.com/blog/third-party-pangram-evals (the second section)
2: the third study they link there is based entirely around the assumption that Pangram is correct, and seems to have been a collaboration or something as they're included in the credits area.
But you could build something that ranks the quality of the webpage content! This would also be more useful.
Of course, that tool would have to use AI...
Even humans who deliberately use lazy formatting and leave obvious errors uncorrected to provide "proof" of being human aren't seeing the big picture, here.
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That bigger picture is that it's easy to make instruct a bot to be lazy, or to avoid the usual quirks. I hate when I'm working on a project and see a constant outflow of negation ("Don't do x, y, or w" is a recent hit) and unfounded exclusive confidence ("The correct answer" as if this is Highlander and there can be only one). Repetitious jargon like overuse of "gate" for things other than fences and skiing is something I can't stand. Plus the usual things — like overuse of unusual punctuation — that are obvious tells.
That stuff all drives me nuts.
But the bot just follows instructions, and my bot has been instructed to avoid those things. It generally performs very well, though the instructions do need re-hashed every now and then as models ebb and flow.
It's super easy to get the bot to write some python or perl that takes a body of text and intentionally some words or lose a comma while mmaking other errors and converting — into --.
When it comes to human error in written language, we just aren't that hard to emulate.
Now, that all said: You'll just have to take my word for it, but I do not use the bot to help with writing English. But I do have every confidence that if I woke up tomorrow and actually started bulking up my comments using a bot, none of you would be able to tell.
People want their slop to be undetectable.
A human-written piece indicates someone believes in it enough to put in enough effort to write it up nicely, so it works as a heuristic of underlying quality.
Humans exercise judgement.
At least when humans lie they're usually doing it on purpose. When machines lie they don't know they're doing it.
They lie more unpredictably.
For some reason, some people repeatedly defend machines that constantly do the same thing, and claim we should give it the benefit of the doubt.
I wonder if we are seeing what may be the result of a Reddit bot campaign to sway generative output.