Can Cerebras-GPT 13B run on Mac Studio M2 Ultra 128GB?

YES — Runs Great

B64Good

○Estimated from fit model

Cerebras-GPT 13B needs ~34.1 GB VRAM. Mac Studio M2 Ultra 128GB has 92.2 GB. With Q5_K_M quantization, expect ~51 tok/s.

Runtime: OllamaCapacity: RoomyBandwidth: HighStack: BasicBottleneck: Balanced

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

Q5_K_M (High quality) — 34.1 GB, 50.6 tok/s, Runs well

34.1 GB required92.2 GB available

37% VRAM used

Fit status

Runs well

Decode

50.6 tok/s

TTFT

3829 ms

Safe context

111K

Memory

34.1 GB / 92.2 GB

Memory breakdown

Weights9.4 GB

KV Cache9.8 GB

Runtime1.2 GB

Headroom13.8 GB

See how fast it feels

See how fast it feelsCerebras-GPT 13B on Mac Studio M2 Ultra 128GB
1st promptCold start — includes initialization
>Solve: If a train travels at 60 mph for 2.5 hours, how far does it go?
Let me work through this step by step.

Given information:
 - Speed = 60 mph (miles per hour)
 - Time = 2.5 hours

Formula: Distance = Speed x Time

Calculation:
 Distance = 60 mph x 2.5 h
 = 150 miles

The train travels 150 miles.

Double-check: at 60 mph the train covers 60 miles each hour. In half an hour it covers 30 miles. So in 2.5 hours: 60 + 60 + 30 = 150 miles. Confirmed.
2nd promptWarm — model ready, no init overhead
>What if the train stops for 20 minutes halfway?
The stop doesn't change the total distance covered while moving, but it affects total trip time.

Breakdown:
 - First half: 1.25 hours at 60 mph = 75 miles
 - Stop: 20 minutes (no distance)
 - Second half: 1.25 hours at 60 mph = 75 miles

Total distance: 150 miles (same)
Total time: 2.5 h + 0.33 h = 2.83 hours
Average speed: 150 / 2.83 = 53 mph

The distance stays the same but average speed drops to 53 mph because of the stop.
Estimated: 50.6 tok/s decode · 3.8s TTFT (warm) · 126 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

Workload	Grade	Fit	Decode	TTFT	Context
Chat	B	Runs well	50.6 tok/s	2088 ms	111K
Coding	B	Runs well	50.6 tok/s	3829 ms	111K
Agentic Coding	B	Runs well	50.6 tok/s	5569 ms	111K
Reasoning	B	Runs well	50.6 tok/s	4525 ms	111K
RAG	B	Runs well	50.6 tok/s	6961 ms	111K

Quantization options

How Cerebras-GPT 13B (13B params) fits at each quantization level on Mac Studio M2 Ultra 128GB (92.2 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	5.1 GB	Low	B55
Q3_K_S	3	6.4 GB	Low	B55
NVFP4	4	7.3 GB	Medium	B55
Q4_K_M	4	7.9 GB	Medium	B56
Q5_K_M	5	9.4 GB	High	B56
Q6_K	6	10.7 GB	High	B56
Q8_0	8	13.9 GB	Very High	B56
F16Best for your GPU	16	26.7 GB	Maximum	B58

Get started

Copy-paste commands to run Cerebras-GPT 13B on your machine.

Run

docker run --rm -it ghcr.io/ggerganov/llama.cpp:full \
 --hf-repo "cerebras/Cerebras-GPT-13B" \
 --hf-file "Cerebras-GPT-13B-Q5_K_M.gguf" \
 -c 4096 -ngl 99

Upgrade options

Hardware that runs Cerebras-GPT 13B well

👁 NVIDIA
RTX PRO 6000 Blackwell Workstation Edition 96GBBudget pick

1792 GB/s (+992)

Raises estimated decode speed by about 224%.164 tok/s decode

Raises estimated decode speed by about 224%.

~$9,999 MSRP

👁 NVIDIA
RTX PRO 6000 Blackwell Server Edition 96GBBest value

1597 GB/s (+797)

Raises estimated decode speed by about 189%.146.2 tok/s decode

Raises estimated decode speed by about 189%.