Can Solar Open 100B i1 run on Mac Studio M1 Ultra 128GB?

YES — Tight Fit

C46Usable

○Estimated from fit model

Solar Open 100B i1 needs ~87.4 GB VRAM. Mac Studio M1 Ultra 128GB has 92.2 GB. With Q4_K_M quantization, expect ~7 tok/s.

Runtime: llama.cppCapacity: TightBandwidth: HighStack: StandardBottleneck: Memory bandwidth

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) — 87.4 GB, 7.2 tok/s, Tight fit

87.4 GB required92.2 GB available

95% VRAM used

Fit status

Tight fit

Decode

7.2 tok/s

TTFT

26840 ms

Safe context

22K

Memory

87.4 GB / 92.2 GB

Memory breakdown

Weights61.0 GB

KV Cache11.7 GB

Runtime0.9 GB

Headroom13.8 GB

See how fast it feels

See how fast it feelsSolar Open 100B i1 on Mac Studio M1 Ultra 128GB
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: 7.2 tok/s decode · 26.8s TTFT (warm) · 18 tok/s prefill

What limits this setup

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.

Very little memory headroom

You can run the model, but there is not much room left for longer context, bigger batches, extra apps, or future model updates.

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

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.

Buy headroom, not only minimum fit

A slightly larger memory tier gives you safer context growth and makes the recommendation more future-proof.

Performance by workload

Workload	Grade	Fit	Decode	TTFT	Context
Chat	C	Tight fit	7.2 tok/s	14640 ms	22K
Coding	C	Tight fit	7.2 tok/s	26840 ms	22K
Agentic Coding	D	Runs with offload (needs ~4.3 GB host RAM)	6.3 tok/s	44362 ms	22K
Reasoning	C	Tight fit	7.2 tok/s	31720 ms	22K
RAG	D	Runs with offload (needs ~4.3 GB host RAM)	6.3 tok/s	55453 ms	22K

Quantization options

How Solar Open 100B i1 (100B params) fits at each quantization level on Mac Studio M1 Ultra 128GB (92.2 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	39.0 GB	Low	C45
Q3_K_S	3	49.0 GB	Low	C48
NVFP4	4	56.0 GB	Medium	C48
Q4_K_M	4	61.0 GB	Medium	C48
Q5_K_MBest for your GPU	5	72.0 GB	High	C48
Q6_K	6	82.0 GB	High	F0
Q8_0	8	107.0 GB	Very High	F0
F16	16	205.0 GB	Maximum	F0