Amazon Web Services is stepping up its push to make AI infrastructure faster, cheaper, and less power hungry with the formal launch of its third generation training chip, Trainium3, unveiled at AWS re:Invent 2025.  The company introduced Trainium3 UltraServer, a full system built around a 3 nanometer Trainium3 chip plus AWS’s in house networking, framing it as a major leap not only for training large AI models but also for running AI applications during peak demand (Bort). I