Jesús Carreño-Bolufer and Giovanni Giachetti. 2026. On the Need to Compare the Architecture Design of Large Language Models: A Preliminary Reference Metamodel. In Anais do XXIX Congresso Ibero-Americano em Engenharia de Software, maio 11, 2026, Recife/PE, Brasil. SBC, Porto Alegre, Brasil, 458-459.