Can I run this LLM?
Can a Mac Studio M5 Ultra (256GB) run Step 3.7 Flash (MoE)?
Step · Apache 2.0 · estimated for a 256.0 GB machine at 4K context.
Yes — it runs great.
Best fit: Step 3.7 Flash (MoE) at Q5_K_M · 142.0 GB · 64–96 tok/s on a Mac Studio M5 Ultra (256GB).
Every quantization on this machine
| Quant | Size | Speed | Fit |
|---|---|---|---|
| Q2_K | 71.2 GB | 92–138 tok/s | Runs great |
| Q3_K_M | 91.8 GB | 81–122 tok/s | Runs great |
| Q4_K_M | 121.6 GB | 70–105 tok/s | Runs great |
| Q5_K_M | 142.0 GB | 64–96 tok/s | Runs great |
| Q6_K | 171.8 GB | 57–85 tok/s | Tight / slow |
| Q8_0 | 212.0 GB | 49–74 tok/s | Won't fit |
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