Models › gpt oss 120b (MoE) › Apple M4 Max (128 GB)
Can I run gpt oss 120b (MoE) on Apple M4 Max (128 GB)?
Yes
Yes. gpt oss 120b (MoE) fits fully on the Apple M4 Max (128 GB) at Q5_K_M (about 86.4 GB of 96 GB usable, 8k context). ESTIMATE
Verdict by quantization (8k context, f16 KV, 32 GB RAM for offload)
| Quant | Needs | Apple M4 Max (128 GB) (128 GB, ~96 GB GPU-usable) |
|---|---|---|
| Q3_K_M | 61.7 GB | ✅ Fits |
| IQ4_XS | 65.4 GB | ✅ Fits |
| Q4_K_M | 74.1 GB | ✅ Fits |
| MXFP4 | 70.9 GB | ✅ Fits |
| Q5_K_M | 86.4 GB | ⚠️ Fits, tight |
| Q6_K | 99.1 GB | ❌ Doesn't fit |
| Q8_0 | 127.4 GB | ❌ Doesn't fit |
| F16 | 237.0 GB | ❌ Doesn't fit |
Speed
No measured run for this pair yet, and we don't estimate MoE speeds. Submit a llama-bench run.
Memory figures are estimates from the model's parameter count and config.json (Hugging Face). How we calculate. Last verified with data from 2026-10-20.
FAQ
Can I run gpt oss 120b (MoE) on the Apple M4 Max (128 GB)?
Yes. gpt oss 120b (MoE) fits fully on the Apple M4 Max (128 GB) at Q5_K_M (about 86.4 GB of 96 GB usable, 8k context).
How much VRAM does gpt oss 120b (MoE) need?
About 74.1 GB at Q4_K_M and 127.4 GB at Q8_0 with 8k context (estimate).
Other models on Apple M4 Max (128 GB): gpt-oss 20B (MoE) · Qwen3.6 27B · Qwen3.6 35B A3B (MoE) · Qwen3.8 27B · Gemma 4 31B · Gemma 4 26B A4B (MoE) · Qwen3 Coder 30B A3B (MoE) · GLM 4.7 Flash · Llama 3.1 8B Instruct
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