It's literally called a pie. It's a bread pie.

Pizza is NOT a pie. It is an open-face sandwich.

I would call Chicago deep dish a pie, which is as close as that gets, as much as I call it pizza. No.

Chicago deep dish is a pie as it has filling. I will also accept stuffed pizza as a pie. Other kinds however are a form of savory galette as they have toppings rather than fillings.

Pizza is as much of a pie as it is a sandwich.

In my opinion it doesn't have enough filling to be considered a pie and the pizza crust doesn't typically fit the form of a pie.

From Duck AI:

Yes, pizza can be classified as a type of pie, specifically a “savory pie.” The term "pie" generally refers to a dish consisting of a pastry crust filled with various ingredients. In the case of pizza, the crust serves as the base, while toppings like sauce, cheese, and various meats or vegetables make up the filling.

ChatGPT:

Yes — pizza is technically classified as a type of pie.

The word pizza pie is especially common in the United States, particularly in places like New York City. The classification comes from culinary definitions:

A pie is traditionally defined as a baked dish consisting of a crust that holds a filling.

Pizza has a dough crust with toppings baked on it.

Structurally, that makes it an open-faced savory pie.

In fact, the earliest pizzas from Naples — such as the classic Pizza Margherita — fit that description: dough base + toppings + baked.

That said, in everyday language most people don’t think of pizza as “pie” the way they think of apple or pumpkin pie. Culinarily? Yes. Socially? Usually no.

Grok:

No, pizza is not formally classified as a pie in any strict culinary, scientific, or international sense—but in some American contexts (especially New York and parts of the Northeast), people casually call it a "pie" or "pizza pie."Here's the breakdown:Culinary classification Pizza is universally recognized as a type of flatbread or savory baked dough dish (Wikipedia and most food authorities list it this way). Traditional pies involve a pastry crust with a filling that's usually enclosed (or semi-enclosed) and baked—think apple pie, chicken pot pie, etc. Pizza has an open top with toppings baked directly onto the dough, so it doesn't fit the classic pie definition. Etymology and history The word "pizza" comes from Italian (first recorded around 997 AD), likely from earlier terms for flatbread or something pinched/pounded, not from "pie." In Italy, pizza and pie-like dishes (torta, crostata) are distinct. Why some people say "pie" anyway When Italian immigrants brought pizza to the US in the late 19th/early 20th century, English speakers didn't have a direct word for it. The round shape, crust, and wedge slices reminded them of pies, so early references called it "tomato pie" or just "pie." This stuck culturally—especially in New York, where "a pie" can still mean a whole pizza (vs. individual slices). The famous line from Dean Martin's 1953 song "That's Amore" ("When the moon hits your eye like a big pizza pie") helped popularize the phrase nationwide.

So: Technically and globally → No, pizza is not a pie.
In casual American (especially East Coast) slang → Yes, it's often called "pie."

It's basically a linguistic/cultural quirk rather than an official classification.