CONFIGURATION / CAPACITY
Mac Studio M5 Ultra · 256 GB unified
A 256 GB unified-memory configuration, not the maximum available configuration. Reserve memory for the OS, KV cache and multimodal components; verify a Metal/MLX path. manufacturer specification ↗.
Text models within the planning estimate
These are capacity candidates under a generic Q4 formula, not measured executions. The total estimate does not separately prove KV cache, vision encoder, runtime support or multi-GPU placement.
| Model | Q4 planning | Quality | Checkpoint |
|---|---|---|---|
| Qwen3.5 9B | ~15 GB | — | source ↗ |
| Qwen3.8 27B | ~29 GB | 75.3 · LiveBench 2026-06-25 | source ↗ |
| Qwen3.5 35B A3B | ~35 GB | — | source ↗ |
| GLM-5.3 Flash | ~248 GB | 71.6 · LiveBench 2026-06-25 | source ↗ |
Documented media paths
These are publisher-documented CUDA memory paths; exact GPU architecture, ARM64, precision, offload, resolution and runtime may differ from this machine.
No matching documented path in this reviewed subset. This is not proof of incompatibility.
Specification reviewed: 2026-09-24. No price or stock claim is made here.