[pessimist]

The standard model is 100% quantum mechanics. It's just QM as applied to fields. While undergrads start with single or few particle quantum mechanics.

There is a lot of hard math and fundamental physical ideas that pop out when we apply quantum mechanics to fields, but it's still QM.

The work of Heisenberg, Schrodinger, Dirac, Pauli from 1925-28 or so is absolutely not our date.

[adastra22]

We are getting into definitions and common usage debates, which is the most uninteresting debate to have. I will simply state that “quantum mechanics” unqualified typically refers to the description of reality developed on Copenhagen in the 1920’s. When people are referring to quantum field theory, they are usually explicit in doing so.