SmolVLM 500M Instruct needs ~15.2 GB VRAM. Mac Studio M2 Ultra 128GB has 92.2 GB. With Q6_K quantization, expect ~7 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
7.0 tok/s
TTFT
27657 ms
Safe context
12.3M
Memory
15.2 GB / 92.2 GB
The model fits in shared memory, but shared-memory bandwidth is now the real limiter.
Fit does not mean dedicated-VRAM speed
Unified or shared memory can make a model technically fit, but sustained tokens per second may still trail a discrete high-bandwidth GPU with less total memory.
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.
Prioritize bandwidth, not only capacity
If this workload feels slow, the next useful step is often a GPU tier with materially faster memory bandwidth rather than only a small bump in capacity.
| Workload | Grade | Fit | Decode | TTFT | Context |
|---|---|---|---|---|---|
| Chat | D | Runs well | 7.0 tok/s | 15086 ms | 6.2M |
| Coding | D | Runs well | 7.0 tok/s | 27657 ms | 12.3M |
| Agentic Coding | D | Runs well | 7.0 tok/s | 40229 ms | 21.0M |
| Reasoning | D | Runs well | 7.0 tok/s | 32686 ms | 12.3M |
| RAG | D | Runs well | 7.0 tok/s | 50286 ms | 21.0M |
How SmolVLM 500M Instruct (0.5B params) fits at each quantization level on Mac Studio M2 Ultra 128GB (92.2 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 0.2 GB | Low | D39 |
Q3_K_S | 3 | 0.2 GB | Low | D39 |
NVFP4 | 4 |
Copy-paste commands to run SmolVLM 500M Instruct on your machine.
Run
docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
--hf-repo "ggml-org/SmolVLM-500M-Instruct-GGUF" \
--hf-file "SmolVLM-500M-Instruct-GGUF-Q6_K.gguf" \
-c 4096 -ngl 99Yes, Mac Studio M2 Ultra 128GB can run SmolVLM 500M Instruct with a D grade (Runs well). Expected decode speed: 7.0 tok/s.
SmolVLM 500M Instruct (0.5B parameters) requires approximately 15.2 GB of memory with Q6_K quantization.
The recommended quantization for SmolVLM 500M Instruct is Q6_K, which balances quality and memory efficiency.
On Mac Studio M2 Ultra 128GB, SmolVLM 500M Instruct achieves approximately 7.0 tokens per second decode speed with a time-to-first-token of 27657ms using Q6_K quantization.
For coding workloads, SmolVLM 500M Instruct on Mac Studio M2 Ultra 128GB receives a D grade with 7.0 tok/s and 12.3M context.
On Mac Studio M2 Ultra 128GB, SmolVLM 500M Instruct can safely use up to 12.3M tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.
Paste this snippet into any page to show a live fit card.
<iframe src="https://willitrunai.com/embed/hf-ggml-org--smolvlm-500m-instruct-gguf-on-m2-ultra-128gb" width="400" height="180" frameborder="0" style="border:none;border-radius:12px;overflow:hidden;" title="Will It Run AI — fit result"></iframe>
Preview:
0.3 GB |
| Medium |
| D39 |
Q4_K_M | 4 | 0.3 GB | Medium | D39 |
Q5_K_M | 5 | 0.4 GB | High | D39 |
Q6_K | 6 | 0.4 GB | High | D39 |
Q8_0 | 8 | 0.5 GB | Very High | D39 |
F16Best for your GPU | 16 | 1.0 GB | Maximum | D39 |
Prioritize bandwidth, not only capacity. If this workload feels slow, the next useful step is often a GPU tier with materially faster memory bandwidth rather than only a small bump in capacity.
Not always. Mac Studio M2 Ultra 128GB 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.