MacBook Pro M4 32GBコスパ重視
32 GB Unified (+16)120 GB/s (+20)
B
Adds memory headroom for longer context windows and future model growth.32.6 tok/sデコード
Adds memory headroom for longer context windows and future model growth.
〜$799 MSRP
Can Phi 3.5 Mini 4B run on MacBook Air M2 16GB?
YES — Tight Fit
B66Good
Estimated from fit model
Phi 3.5 Mini 4B needs ~10.9 GB VRAM. MacBook Air M2 16GB has 11.5 GB. With Q4_K_M quantization, expect ~27 tok/s.
Runtime: llama.cppCapacity: TightBandwidth: Very lowStack: 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.
Select quantization to explore
Q4_K_M (Medium quality) — 10.9 GB, 26.6 tok/s, Tight fit
10.9 GB required11.5 GB available
95% VRAM used
Fit status
Tight fit
Decode
26.6 tok/s
TTFT
7267 ms
Safe context
18K
Memory
10.9 GB / 11.5 GB
Memory breakdown
Weights2.4 GB
KV Cache5.9 GB
Runtime0.9 GB
Headroom1.7 GB
See how fast it feels
See how fast it feelsPhi 3.5 Mini 4B on MacBook Air M2 16GB
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: 26.6 tok/s decode · 7.3s TTFT (warm) · 67 tok/s prefill
What limits this setup
This setup is broadly balanced for this model.
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
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 | B | Runs well | 26.6 tok/s | 3964 ms | 18K |
| Coding | B | Tight fit | 26.6 tok/s | 7267 ms | 18K |
| Agentic Coding | F | Too heavy | 16.1 tok/s | 17490 ms | 18K |
| Reasoning | B | Tight fit | 26.6 tok/s | 8589 ms | 18K |
| RAG | F | Too heavy | 16.1 tok/s | 21862 ms | 18K |
Quantization options
How Phi 3.5 Mini 4B (4B params) fits at each quantization level on MacBook Air M2 16GB (11.5 GB usable).
| Quant | Bits | VRAM | Quality | Fit |
|---|---|---|---|---|
Q2_K | 2 | 1.6 GB | Low | B64 |
Q3_K_S | 3 | 2.0 GB | Low | B64 |
NVFP4 | 4 | 2.2 GB | Medium | B64 |
Q4_K_M | 4 | 2.4 GB | Medium | B65 |
Q5_K_M | 5 | 2.9 GB | High | B65 |
Q6_K | 6 | 3.3 GB | High | B66 |
Q8_0 | 8 | 4.3 GB | Very High | B67 |
F16Best for your GPU | 16 | 8.2 GB | Maximum | B67 |
Get started
Copy-paste commands to run Phi 3.5 Mini 4B on your machine.
Run
ollama run phi3.5アップグレードオプション
Phi 3.5 Mini 4Bを快適に動かすハードウェア
MacBook Air M4 24GBコスパ最良
24 GB Unified (+8)120 GB/s (+20)
B
Adds memory headroom for longer context windows and future model growth.32.6 tok/sデコード
Adds memory headroom for longer context windows and future model growth.
〜$1,099 MSRP
MacBook Pro M3 24GBAppleアップグレード
24 GB Unified (+8)
B
Adds memory headroom for longer context windows and future model growth.27.9 tok/sデコード
Adds memory headroom for longer context windows and future model growth.
〜$1,099 MSRP
Frequently asked questions
Can MacBook Air M2 16GB run Phi 3.5 Mini 4B?
Yes, MacBook Air M2 16GB can run Phi 3.5 Mini 4B with a B grade (Tight fit). Expected decode speed: 26.6 tok/s.
How much VRAM does Phi 3.5 Mini 4B need?
Phi 3.5 Mini 4B (4B parameters) requires approximately 10.9 GB of memory with Q4_K_M quantization.
What is the best quantization for Phi 3.5 Mini 4B?
The recommended quantization for Phi 3.5 Mini 4B is Q4_K_M, which balances quality and memory efficiency.
What speed will Phi 3.5 Mini 4B run at on MacBook Air M2 16GB?
On MacBook Air M2 16GB, Phi 3.5 Mini 4B achieves approximately 26.6 tokens per second decode speed with a time-to-first-token of 7267ms using Q4_K_M quantization.
Can MacBook Air M2 16GB run Phi 3.5 Mini 4B for coding?
For coding workloads, Phi 3.5 Mini 4B on MacBook Air M2 16GB receives a B grade with 26.6 tok/s and 18K context.
What context window can Phi 3.5 Mini 4B use on MacBook Air M2 16GB?
On MacBook Air M2 16GB, Phi 3.5 Mini 4B can safely use up to 18K tokens of context. The model's official context limit is 128K, but available memory constrains the safe maximum.
What should I upgrade first if Phi 3.5 Mini 4B feels slow on MacBook Air M2 16GB?
Buy headroom, not only minimum fit. A slightly larger memory tier gives you safer context growth and makes the recommendation more future-proof.
Is unified memory on MacBook Air M2 16GB as fast as VRAM for Phi 3.5 Mini 4B?
Not always. MacBook Air M2 16GB 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.
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