Amazon has announced a new family of frontier artificial intelligence models—and a new way for customers to build frontier models of their own.The ecommerce giant announced the second generation of its Nova AI models at re:Invent, a company conference held in Las Vegas. The models are nowhere near as popular as those offered by rivals like OpenAI and Google, but Amazon’s plan to make them highly customizable could see them gain traction with its cloud users.Amazon detailed two improved large lan...