Larry Flick from Billboard described the song as "a jumpy, funk-lined jeep anthem that allows Coolio plenty of room to work up a fun, lyrical sweat."

He added, "The sample-happy groove provides a wigglin' good time, riding primarily on a prominent snippet of the early '80s 12-incher "Wikka Wrap" by the Evasions.

"[3] Gil L. Robertson IV from Cash Box picked "1, 2, 3, 4 (Sumpin' New)" as a "standout track" of the Gangsta's Paradise album.

He remarked, "Unlike so many hip hop singles which lean towards often depressing issues, this is a spirited happy record about having a great party.

[6] A music video (directed by David Dobkin) for the Timber mix was released, featuring Coolio attempting to get to a party.