Lao Guo's Learning Space

Sep 26, 2026 · Artificial Intelligence

Mac Studio M5: 128GB vs 256GB for Local LLMs — Memory Ceiling & Speed Trade-offs

This guide analyzes Mac Studio M5 memory options (128GB vs 256GB) for running local large language models, detailing model size limits, quantization impact, KV cache overhead, memory bandwidth differences, and a ¥35K price gap to help developers choose the right tier for their workload.