Running GLM 5.2 on Mac Studio Ultra
GLM 5.2 has 744 billion parameters. Mac Studio Ultra offers 512 GB of Apple unified memory. This page puts the two side by side.
How much memory does GLM 5.2 need?
Weights take the parameter count multiplied by the format size, plus a 15% runtime margin for activations and buffers. The attention cache sits on top: it grows with context length and with the number of concurrent requests, so it is sized case by case.
| Format | Weights in memory | On this machine | What the format costs |
|---|---|---|---|
| FP16 | 1,711 GB | does not fit | full precision, the quality reference |
| FP8 | 856 GB | does not fit | negligible loss on most tasks |
| NVFP4 | 428 GB | tight | Blackwell format, native FP4 compute |
| Q4 | 428 GB | tight | block quantisation, broadly supported |
What is left to serve requests?
GLM 5.2 barely fits on Mac Studio Ultra. In NVFP4, its weights take about 428 GB against 512 GB available. The 84.2 GB margin disappears quickly as context grows. The remaining margin decides how many concurrent requests and how much context the machine sustains. A margin below a quarter of memory forces a limit on context or on concurrency.
Mac Studio Ultra ranges from 39 to 59 k€, indicative and not contractual. The machine targets the TPE, PME segment.
Where else can GLM 5.2 run?
- GLM 5.2 on DGX Station
- GLM 5.2 on RTX PRO 6000 server
- GLM 5.2 on H200 SXM server
- GLM 5.2 on B200 SXM
- GLM 5.2 on B300 SXM
See the GLM 5.2 and Mac Studio Ultra fact sheets.
How much memory does GLM 5.2 need?
In NVFP4, weights take about 428 GB including the runtime margin. The attention cache sits on top and depends on context.
Does GLM 5.2 fit on Mac Studio Ultra?
GLM 5.2 barely fits on Mac Studio Ultra. In NVFP4, its weights take about 428 GB against 512 GB available. The 84.2 GB margin disappears quickly as context grows.
Method
Parameter counts and memory figures come from the site fact sheets. Memory footprints are calculated, not measured: a reading on real hardware may differ depending on the engine and the exact weight format. Prices are indicative and not contractual.