openchat 3.6 8b 20240522 IMat needs ~13.6 GB VRAM. Mac Studio M1 Ultra 64GB has 46.1 GB. With Q4_K_M quantization, expect ~90 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
90.2 tok/s
TTFT
2147 ms
Safe context
570K
Memory
13.6 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 | 90.2 tok/s | 1171 ms | 570K |
| Coding | C | Runs well | 90.2 tok/s | 2147 ms | 570K |
| Agentic Coding | C | Runs well | 90.2 tok/s | 3123 ms | 570K |
| Reasoning | C | Runs well | 90.2 tok/s | 2538 ms | 570K |
| RAG | C | Runs well | 90.2 tok/s | 3904 ms | 570K |
How openchat 3.6 8b 20240522 IMat (8B params) fits at each quantization level on Mac Studio M1 Ultra 64GB (46.1 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 3.1 GB | Low | C41 |
Q3_K_S | 3 | 3.9 GB | Low | C41 |
NVFP4 | 4 |
Copy-paste commands to run openchat 3.6 8b 20240522 IMat on your machine.
Run
lms load hf-legraphista--openchat-3-6-8b-20240522-imat-gguf && lms server startYes, Mac Studio M1 Ultra 64GB can run openchat 3.6 8b 20240522 IMat with a C grade (Runs well). Expected decode speed: 90.2 tok/s.
openchat 3.6 8b 20240522 IMat (8B parameters) requires approximately 13.6 GB of memory with Q4_K_M quantization.
The recommended quantization for openchat 3.6 8b 20240522 IMat is Q4_K_M, which balances quality and memory efficiency.
On Mac Studio M1 Ultra 64GB, openchat 3.6 8b 20240522 IMat achieves approximately 90.2 tokens per second decode speed with a time-to-first-token of 2147ms using Q4_K_M quantization.
For coding workloads, openchat 3.6 8b 20240522 IMat on Mac Studio M1 Ultra 64GB receives a C grade with 90.2 tok/s and 570K context.
On Mac Studio M1 Ultra 64GB, openchat 3.6 8b 20240522 IMat can safely use up to 570K 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-legraphista--openchat-3-6-8b-20240522-imat-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:
4.5 GB |
| Medium |
| C42 |
Q4_K_M | 4 | 4.9 GB | Medium | C42 |
Q5_K_M | 5 | 5.8 GB | High | C42 |
Q6_K | 6 | 6.6 GB | High | C42 |
Q8_0 | 8 | 8.6 GB | Very High | C42 |
F16Best for your GPU | 16 | 16.4 GB | Maximum | C45 |
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.