Can Yi 1.5 6B run on MacBook Pro M4 Max 36GB?

YES — Runs Great

C49Usable

Estimated from fit model

Yi 1.5 6B needs ~9.4 GB VRAM. MacBook Pro M4 Max 36GB has 25.9 GB. With Q4_K_M quantization, expect ~84 tok/s.

Runtime: llama.cppCapacity: RoomyBandwidth: LowStack: StandardBottleneck: 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

Q4_K_M (Medium quality) — 9.4 GB, 83.7 tok/s, Runs well

9.4 GB required25.9 GB available

36% VRAM used

Fit status

Runs well

Decode

83.7 tok/s

TTFT

2314 ms

Safe context

Memory

9.4 GB / 25.9 GB

Memory breakdown

Weights3.7 GB

KV Cache1.0 GB

Runtime0.9 GB

Headroom3.9 GB

See how fast it feels

See how fast it feelsYi 1.5 6B on MacBook Pro M4 Max 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: 83.7 tok/s decode · 2.3s TTFT (warm) · 209 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	C	Runs well	83.7 tok/s	1262 ms	4K
Coding	C	Runs well	83.7 tok/s	2314 ms	4K
Agentic Coding	C	Runs well	83.7 tok/s	3366 ms	4K
Reasoning	C	Runs well	83.7 tok/s	2735 ms	4K
RAG	C	Runs well	83.7 tok/s	4208 ms	4K

Inference speed

Yi 1.5 6B inference speed — tokens per second by GPU & Mac

Estimated decode speed (tokens/sec) for Yi 1.5 6B at Q4_K_M across popular GPUs and Apple Silicon, using the fastest local runtime per device. Fastest is RTX 5090 32GB at ~114 tok/s. Speed is memory-bandwidth bound, so cards that fit the whole model in VRAM run far faster than ones that offload to system RAM.

GPU / Mac	Memory	Quant	Speed (tok/s)	Fits?
RTX 5090 32GB	32 GB	Q4_K_M	114.0	Fits
RTX 4090 24GB	24 GB	Q4_K_M	84.0	Fits
RTX 4080 Super 16GB	16 GB	Q4_K_M	84.0	Fits
RTX 3090 24GB	24 GB	Q4_K_M	84.0	Fits
RTX 4070 12GB	12 GB	Q4_K_M	84.0	Fits
RX 7900 XTX 24GB	24 GB	Q4_K_M	84.0	Fits
MacBook Pro M4 Max 128GB	128 GB	Q4_K_M	84.0	Fits
Mac Studio M3 Ultra 256GB	256 GB	Q4_K_M	84.0	Fits
Mac Studio M2 Ultra 128GB	128 GB	Q4_K_M	84.0	Fits
Mac Studio M1 Ultra 128GB	128 GB	Q4_K_M	84.0	Fits
MacBook Pro M4 Max 64GB	64 GB	Q4_K_M	84.0	Fits
MacBook Pro M3 Max 64GB	64 GB	Q4_K_M	71.3	Fits
RTX 3060 12GB	12 GB	Q4_K_M	70.6	Fits
MacBook Pro M1 Max 64GB	64 GB	Q4_K_M	65.4	Fits
MacBook Pro M4 Pro 48GB	48 GB	Q4_K_M	57.5	Fits
RTX 4060 8GB	8 GB	Q4_K_M	54.3	Fits

Estimates for single-stream decoding at Q4_K_M; real tokens/sec varies with prompt length, context, batch size, and runtime build. Prompt processing (prefill) is faster than the decode figures shown here.

Quantization options

How Yi 1.5 6B (6B params) fits at each quantization level on MacBook Pro M4 Max 36GB (25.9 GB usable).

Quant	Bits	VRAM	Quality	Fit
Q2_K	2	2.3 GB	Low	C44
Q3_K_S	3	2.9 GB	Low	C44
NVFP4	4	3.4 GB	Medium	C44
Q4_K_M	4	3.7 GB	Medium	C44
Q5_K_M	5	4.3 GB	High	C44
Q6_K	6	4.9 GB	High	C45
Q8_0	8	6.4 GB	Very High	C45
F16Best for your GPU	16	12.3 GB	Maximum	C49

Get started

Copy-paste commands to run Yi 1.5 6B on your machine.

Run

lms load Yi-1.5-6B-Chat && lms server start

Frequently asked questions

Can MacBook Pro M4 Max 36GB run Yi 1.5 6B?

Yes, MacBook Pro M4 Max 36GB can run Yi 1.5 6B with a C grade (Runs well). Expected decode speed: 83.7 tok/s.

How much VRAM does Yi 1.5 6B need?

Yi 1.5 6B (6B parameters) requires approximately 9.4 GB of memory with Q4_K_M quantization.

What is the best quantization for Yi 1.5 6B?

The recommended quantization for Yi 1.5 6B is Q4_K_M, which balances quality and memory efficiency.

What speed will Yi 1.5 6B run at on MacBook Pro M4 Max 36GB?

On MacBook Pro M4 Max 36GB, Yi 1.5 6B achieves approximately 83.7 tokens per second decode speed with a time-to-first-token of 2314ms using Q4_K_M quantization.

Can MacBook Pro M4 Max 36GB run Yi 1.5 6B for coding?

For coding workloads, Yi 1.5 6B on MacBook Pro M4 Max 36GB receives a C grade with 83.7 tok/s and 4K context.

What context window can Yi 1.5 6B use on MacBook Pro M4 Max 36GB?

On MacBook Pro M4 Max 36GB, Yi 1.5 6B can safely use up to 4K tokens of context. The model's official context limit is 4K, but available memory constrains the safe maximum.

Is unified memory on MacBook Pro M4 Max 36GB as fast as VRAM for Yi 1.5 6B?

Not always. MacBook Pro M4 Max 36GB 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 MacBook Pro M4 Max 36GB See all hardware for Yi 1.5 6B

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