Samsung Electronics' foundry division is accelerating validation of its gate-all-around (GAA) 2nm process through Tesla's next-generation autonomous-driving and AI chips, known as AI5 and AI6. The orders, estimated at approximately 20 trillion won ($14.5 billion), are expected to enter full-scale mass production from 2027 and could help validate Samsung's process technology while improving utilization at its Taylor, Texas, fab, where investment has exceeded $37 billion. Analysts say successful production validation could support additional orders from fabless companies such as Nvidia and Qualcomm. Separately, SK Hynix published a Co-Packaged Optics (CPO) roadmap in Nature Electronics, outlining optical connections between compute, memory and multiple accelerators to address bandwidth constraints in hyperscale AI clusters. The companies will present different HBM technologies at Hot Chips 2026: Samsung will focus on the base die, while SK Hynix will present advanced packaging, including its Advanced MR-MUF technology for heat management and warpage reduction. The shift reflects a more complex HBM4 competition centered on system design, stacking, thermal performance and yield rather than speed alone.