Will It Run AI

Can OpenChat 3.5 7B Starling v2.0 i1 run on Mac Studio M1 Ultra 64GB?

YES — Runs Great

C47Usable
Estimated from fit model

OpenChat 3.5 7B Starling v2.0 i1 needs ~12.9 GB VRAM. Mac Studio M1 Ultra 64GB has 46.1 GB. With Q4_K_M quantization, expect ~98 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: HighStack: StandardBottleneck: Balanced
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Operating mode

Choose the run profile you care about

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.

Capabilities:

Select quantization to explore

Q4_K_M (Medium quality) — 12.9 GB, 98.0 tok/s, Runs well
12.9 GB required46.1 GB available
28% VRAM used

Fit status

Runs well

Decode

98.0 tok/s

TTFT

1976 ms

Safe context

663K

Memory

12.9 GB / 46.1 GB

Memory breakdown

Weights4.3 GB
KV Cache0.8 GB
Runtime0.9 GB
Headroom6.9 GB

See how fast it feels

See how fast it feelsOpenChat 3.5 7B Starling v2.0 i1 on Mac Studio M1 Ultra 64GB
1st promptCold start — includes initialization
>What is local AI inference?
Local AI inference means running an AI language model directly on your own hardware — your laptop, desktop, or server — instead of sending requests to a remote cloud API. When you run inference locally the model weights are loaded into your GPU or unified memory. Each token you generate requires reading those weights from memory, so memory bandwidth is the main bottleneck for decode speed. Key benefits of running locally: - Full privacy: your prompts never leave your machine - No per-token cost or rate limits - Works offline once the model is downloaded - Latency depends only on your hardware
2nd promptWarm — model ready, no init overhead
>How much VRAM do I need?
It depends on the model size and quantization level. A rough rule of thumb: Model size Q4 (4-bit) Q8 (8-bit) FP16 7B params ~4.3 GB ~7.5 GB ~14 GB 13B params ~7.9 GB ~13.9 GB ~26 GB 70B params ~42.7 GB ~74.9 GB ~140 GB Most people use 4-bit quantization (Q4_K_M) which gives 90-95% of full quality at a fraction of the memory. A 24 GB GPU can comfortably run most 7B-13B models.
Estimated: 98.0 tok/s decode · 2.0s TTFT (warm) · 245 tok/s prefill

What limits this setup

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.

Best improvement path

Performance by workload

WorkloadGradeFitDecodeTTFTContext
ChatCRuns well98.0 tok/s1078 ms663K
CodingCRuns well98.0 tok/s1976 ms663K
Agentic CodingCRuns well98.0 tok/s2873 ms663K
ReasoningCRuns well98.0 tok/s2335 ms663K
RAGCRuns well98.0 tok/s3592 ms663K

Quantization options

How OpenChat 3.5 7B Starling v2.0 i1 (7B params) fits at each quantization level on Mac Studio M1 Ultra 64GB (46.1 GB usable).

QuantBitsVRAMQualityFit
Q2_K
2
2.7 GB
LowC41
Q3_K_S
3
3.4 GB
LowC41
NVFP4
4
3.9 GB
MediumC41
Q4_K_M
4
4.3 GB
MediumC41
Q5_K_M
5
5.0 GB
HighC41
Q6_K
6
5.7 GB
HighC42
Q8_0
8
7.5 GB
Very HighC42
F16Best for your GPU
16
14.3 GB
MaximumC44

Get started

Copy-paste commands to run OpenChat 3.5 7B Starling v2.0 i1 on your machine.

Run

lms load hf-mradermacher--openchat-3-5-7b-starling-v2-0-i1-gguf && lms server start

Frequently asked questions

Can Mac Studio M1 Ultra 64GB run OpenChat 3.5 7B Starling v2.0 i1?

Yes, Mac Studio M1 Ultra 64GB can run OpenChat 3.5 7B Starling v2.0 i1 with a C grade (Runs well). Expected decode speed: 98.0 tok/s.

How much VRAM does OpenChat 3.5 7B Starling v2.0 i1 need?

OpenChat 3.5 7B Starling v2.0 i1 (7B parameters) requires approximately 12.9 GB of memory with Q4_K_M quantization.

What is the best quantization for OpenChat 3.5 7B Starling v2.0 i1?

The recommended quantization for OpenChat 3.5 7B Starling v2.0 i1 is Q4_K_M, which balances quality and memory efficiency.

What speed will OpenChat 3.5 7B Starling v2.0 i1 run at on Mac Studio M1 Ultra 64GB?

On Mac Studio M1 Ultra 64GB, OpenChat 3.5 7B Starling v2.0 i1 achieves approximately 98.0 tokens per second decode speed with a time-to-first-token of 1976ms using Q4_K_M quantization.

Can Mac Studio M1 Ultra 64GB run OpenChat 3.5 7B Starling v2.0 i1 for coding?

For coding workloads, OpenChat 3.5 7B Starling v2.0 i1 on Mac Studio M1 Ultra 64GB receives a C grade with 98.0 tok/s and 663K context.

What context window can OpenChat 3.5 7B Starling v2.0 i1 use on Mac Studio M1 Ultra 64GB?

On Mac Studio M1 Ultra 64GB, OpenChat 3.5 7B Starling v2.0 i1 can safely use up to 663K tokens of context. The model's official context limit is —, but available memory constrains the safe maximum.

Is unified memory on Mac Studio M1 Ultra 64GB as fast as VRAM for OpenChat 3.5 7B Starling v2.0 i1?

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.

See all results for Mac Studio M1 Ultra 64GBSee all hardware for OpenChat 3.5 7B Starling v2.0 i1
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