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URL: https://willitrunai.com/can-run/phi-3-mini-3.8b-on-m3-pro-36gb

⇱ Phi 3 Mini 3.8B on MacBook Pro M3 Pro 36GB? YES

Can Phi 3 Mini 3.8B run on MacBook Pro M3 Pro 36GB?

YES — Runs Great

B68Good
○Estimated from fit model

Phi 3 Mini 3.8B needs ~13.0 GB VRAM. MacBook Pro M3 Pro 36GB has 25.9 GB. With Q4_K_M quantization, expect ~47 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: Very lowStack: StandardBottleneck: Memory bandwidth
Share:

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) — 13.0 GB, 47.2 tok/s, Runs well
13.0 GB required25.9 GB available
50% VRAM used

Fit status

Runs well

Decode

47.2 tok/s

TTFT

4098 ms

Safe context

51K

Memory

13.0 GB / 25.9 GB

Memory breakdown

Weights2.3 GB
KV Cache5.9 GB
Runtime0.9 GB
Headroom3.9 GB

See how fast it feels

See how fast it feelsPhi 3 Mini 3.8B on MacBook Pro M3 Pro 36GB
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: 47.2 tok/s decode · 4.1s TTFT (warm) · 118 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
ChatBRuns well47.2 tok/s2235 ms51K
CodingBRuns well47.2 tok/s4098 ms51K
Agentic CodingARuns well47.2 tok/s5961 ms51K
ReasoningBRuns well47.2 tok/s4843 ms51K
RAGARuns well47.2 tok/s7451 ms51K

Quantization options

How Phi 3 Mini 3.8B (3.799999952316284B params) fits at each quantization level on MacBook Pro M3 Pro 36GB (25.9 GB usable).

QuantBitsVRAMQualityFit
Q2_K
2
1.5 GB
LowB61
Q3_K_S
3
1.9 GB
LowB61
NVFP4
4
2.1 GB
MediumB61
Q4_K_M
4
2.3 GB
MediumB61
Q5_K_M
5
2.7 GB
HighB61
Q6_K
6
3.1 GB
HighB61
Q8_0
8
4.1 GB
Very HighB62
F16Best for your GPU
16
7.8 GB
MaximumB63

Get started

Copy-paste commands to run Phi 3 Mini 3.8B on your machine.

Run

ollama run phi3:mini

Frequently asked questions

See all results for MacBook Pro M3 Pro 36GBSee all hardware for Phi 3 Mini 3.8B