Qwen3.5 9B needs ~14.4 GB VRAM. Mac Studio M1 Ultra 64GB has 46.1 GB. With Q4_K_M quantization, expect ~80 tok/s.
Operating mode
Interactive favors responsiveness, while light API and scale-out lean harder on serving readiness. The fit stays the same, but the recommendation lens changes.
Current mode
Balanced
Balanced for general local use. Keeps the ranking neutral across personal and serving workflows.
Select quantization to explore
Fit status
Runs well
Decode
80.1 tok/s
TTFT
2416 ms
Safe context
497K
Memory
14.4 GB / 46.1 GB
This setup is broadly balanced for this model.
Shared-memory contention still exists
The OS, browser, and inference runtime all compete for the same physical memory pool, so real-world headroom is less forgiving than raw capacity suggests.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | C | Runs well | 80.1 tok/s | 1318 ms | 497K |
| Coding | C | Runs well | 80.1 tok/s | 2416 ms | 497K |
| Agentic Coding | C | Runs well | 80.1 tok/s | 3514 ms | 497K |
| Reasoning | C | Runs well | 80.1 tok/s | 2855 ms | 497K |
| RAG | C | Runs well | 80.1 tok/s | 4392 ms | 497K |
How Qwen3.5 9B (9B params) fits at each quantization level on Mac Studio M1 Ultra 64GB (46.1 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 3.5 GB | Low | C42 |
Q3_K_S | 3 | 4.4 GB | Low | C42 |
NVFP4 | 4 | 5.0 GB | Medium | C42 |
Q4_K_M | 4 | 5.5 GB | Medium | C42 |
Q5_K_M | 5 | 6.5 GB | High | C42 |
Q6_K | 6 | 7.4 GB | High | C43 |
Q8_0 | 8 | 9.6 GB | Very High | C43 |
F16Best for your GPU | 16 | 18.5 GB | Maximum | C46 |
Copy-paste commands to run Qwen3.5 9B on your machine.
Run
docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
--hf-repo "lmstudio-community/Qwen3.5-9B-GGUF" \
--hf-file "Qwen3.5-9B-GGUF-Q4_K_M.gguf" \
-c 4096 -ngl 99Yes, Mac Studio M1 Ultra 64GB can run Qwen3.5 9B with a C grade (Runs well). Expected decode speed: 80.1 tok/s.
Qwen3.5 9B (9B parameters) requires approximately 14.4 GB of memory with Q4_K_M quantization.
The recommended quantization for Qwen3.5 9B is Q4_K_M, which balances quality and memory efficiency.
On Mac Studio M1 Ultra 64GB, Qwen3.5 9B achieves approximately 80.1 tokens per second decode speed with a time-to-first-token of 2416ms using Q4_K_M quantization.
For coding workloads, Qwen3.5 9B on Mac Studio M1 Ultra 64GB receives a C grade with 80.1 tok/s and 497K context.
On Mac Studio M1 Ultra 64GB, Qwen3.5 9B can safely use up to 497K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.
Not always. Mac Studio M1 Ultra 64GB can often fit larger models thanks to unified memory, but a discrete GPU with dedicated high-bandwidth VRAM may still decode faster once the model fits. For this combination, the important distinction is capacity versus sustained throughput.
Paste this snippet into any page to show a live fit card.
<iframe src="https://willitrunai.com/embed/hf-lmstudio-community--qwen3-5-9b-gguf-on-m1-ultra-64gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
Preview: