Raj Reddy Artificial Intelligence Lecture - Torsten Hoefler October 9, 2025 5:00pm — 6:00pm Location: In Person - Rashid Auditorium, Gates Hillman 4401 Speaker: TORSTEN HOEFLER , Professor of Computer Science, Director, Scalable Parallel Computing Lab, Computer Science Department, ETH Zürich http://htor.ethz.ch/ From Large Language Models to Reasoning Language Models - Three Eras in The Age of Computation. We will explore the fascinating evolution of Large Language Models (LLMs) and their transformative journey through the lenses of computation and optimization. We begin by tracing the origins of LLMs, highlighting how advances in computation and optimization were pivotal in their development. We then delve into the key optimizations that have achieved a staggering 1,000x cost reduction, making LLMs widely accessible even on portable devices. Moving forward, we address the limitations of human-generated data and introduce the concept of constructive hallucination in LLMs. This technique allows for the generation of new hypotheses and their validation through reasoning chains, pushing the boundaries of knowledge creation. Next, we provide an overview of the technology fundamentals and early successes of reasoning models, such as OpenAI's o1 and o3 preview. These models, while significantly enhancing computational capabilities, also exponentially increase computational demands. Finally, we conclude by presenting our ambitious Ultra Ethernet effort, which aims to establish the interconnect standard for future AI workloads. This initiative is crucial in meeting the growing demands at the system level, ensuring seamless and efficient operation in the age of reasoning models.—Torsten Hoefler is a Professor of Computer Science at ETH Zurich, a member of Academia Europaea, and a Fellow of the ACM, IEEE, and ELLIS. He received the 2024 ACM Prize in Computing, one of the highest honors in the field. His research interests revolve around the central topic of "Performance-centric System Design" and include scalable networks, parallel programming techniques, and performance modeling. Torsten won best paper awards at the ACM/IEEE Supercomputing Conference SC10, SC13, SC14, SC19, SC22, SC23, SC24, HPDC'15, HPDC'16, IPDPS'15, and other conferences. He published hundreds of peer-reviewed scientific conference and journal articles and authored chapters of the MPI-2.2 and MPI-3.0 standards. He received the IEEE CS Sidney Fernbach Award, the ACM Gordon Bell Prize, the ISC Jack Dongarra award, the Latsis prize of ETH Zurich, as well as the German Max Planck-Humboldt Medal. Additional information Add event to Google Add event to iCal
