Apple has introduced the M5 Ultra chip in the new Mac Studio, designed to provide unprecedented performance for AI workloads. The chip utilizes next-generation UltraFusion technology to form a quad-die architecture for the first time in an M-series SoC.
Apple's M5 Ultra Mac Studio delivers massive performance boost for local AI agents
The M5 Ultra features an up-to-80-core GPU with dedicated Neural Accelerators, offering up to 4.5x the peak GPU compute for AI compared to the M3 Ultra. It also provides a massive 1.2TB/s of unified memory bandwidth—a 50 percent increase over the M3 Ultra—enabling the execution of large-scale models with hundreds of billions of parameters entirely on device.
Practical testing of the M5 Ultra Mac Studio shows significant improvements in running local AI agents. Compared to the M3 Ultra, the M5 Ultra demonstrated approximately 70% faster text generation. Notably, prompt processing—the speed at which a model reads a prompt—saw an average increase of 150%, roughly a 2.5x improvement over the previous generation. These advancements make high-performance agentic loops, which require rapid iteration and large context windows, viable for local execution without relying on cloud-based APIs.
Sources
- M5 Ultra Mac Studio Review: The Dream Mac for Local AI Agents （Hacker News Frontpage, 2026-09-21）
- Apple Newsroom