Analysis of upcoming releases · Scheduled for release on September 22, 2026 · Updated 2026-09-06
Integrated memory 256GB · Usable space for model: approximately 236GB
Mac Studio M5 Ultra 256GB Local LLM Speed/Memory/Electricity Rate
Provides 1,200 GB/s (1.2 TB/s) aggregate bandwidth and 256 GB of memory. Extra-large MoEs are considered for single-device loading only if compatible archives and runtimes are confirmed.
Core specifications
- available memory
- 236GB
- Memory bandwidth
- 1200GB/s
- local LLM sustained load
- about 300W
- Korean price range (KRW)
- 1,850–2,000 × KRW 10,000
a person who fits well
- Utilizes 236GB of available memory
- Quiet finished product composition
- GLM-5.3-Flash (MoE) level local inference
Check before purchasing
Actual sales configuration, runtime support, and actual performance may vary for pre-release products, so please check again at the time of purchase.
4K context · Q4 model-specific expected performance
| Model | required memory | Decode | First token | Prefill |
|---|---|---|---|---|
| Gemma 4 12B MLX 4-bit | 8GB | 122.4 ~ 136 tok/s | 2.5 ~ 4.5 s | 909 ~ 1,666 tok/s |
| GLM-5.3-Flash (MoE) MLX 4-bit | 190.21GB | 81.3 ~ 90.3 tok/s | 15.0 ~ 26.1 s | 157 ~ 273 tok/s |
Single-user expected range and may vary depending on runtime, cooling, and quantization files.
Frequently Asked Questions
Which local LLM can be run on the Studio M5 Ultra 256GB?
Gemma 4 12B, GLM-5.3-Flash (MoE), etc. can be compared with 4K input and device-specific recommended formats. The required memory varies depending on the model and context length.
What is the local LLM power of the Studio M5 Ultra 256GB?
Expected to consume approximately 300W under sustained load, with an actual range estimated between 220–430W.
Are the displayed token speeds ground truth?
This is an estimated range calibrated to the calculator against official hardware specifications and verified benchmark ranges. Runtime, cooling, quantization may vary depending on file and context length.