Tyra Banks: My Baby's Also Photogenic

Tyra Banks revealed her pride and joy -- showing the world what a top model baby looks like ... and he's adorable.

Tyra posted the pic on social media Sunday, captioning it, "This is the Happiest Valentine's Day of my life. York, Daddy @erikasla and I send you so much love."

As we reported ... the 42-year-old and her bf Erik Asla had a little boy with the help of a surrogate in January.

Mazel!