Don't see it.

first do a search, then on top you'll see "Filter". might try to make more prominent from main page

an hour ago | parent | next [-]

[deleted]

macote 2 hours ago | parent | prev [-]

Yes, please, I couldn't figure it out as well.

	▲	karpathy an hour ago \| parent [-]
		added! now can be done via Filter on the main page.