What detector are you using? How can you be sure of its accuracy given that every commercial AI detector has been debunked?

Almost every. Pangram is pretty accurate on longer texts. I haven't seen any glaring examples of false positives.

	▲	malshe 9 hours ago \| parent \| next [-]
		I’ve heard good things about Pangram but it’s trivially easy to fool it. I generated text using Opus 4.8 and then humanized it using Grammarly. Pangram determined it 100% human-written. Tried it numerous times with the same result. GPTZero claimed with 80% confidence that it was human-written but AI polished. Nothing in that text was human-written.
	▲	adamgordonbell 11 hours ago \| parent \| prev [-]
		This! Pangram is very good. They claim 1 in 10,000 fp rate. I had to change my mind on AI detectors after playing around with it. It would be interesting to hear how this detector compares. It also seems to be aiming for low fp rate.