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BECoach-Qwen3.5-4B-4bit-mlx
apexlearn/BECoach-Qwen3.5-4B-4bit-mlx
BECoach-Qwen3.5-4B-4bit-mlx is a machine learning model from apexlearn. Use it for the machine learning task on the model card, and read the license before you ship it in a product. It is set up for mlx. The card lists the license as apache-2.0.
The first Qwen3.5-4B model quantized for on-device inference on iPhone via mlx-swift.
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4.2B
2.4 GB on disk
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.safetensors2.4 GB · 99%
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U324.2B · 100%
Base models
Model card
From the Hugging Face model README
BECoach — Qwen3.5-4B (4-bit MLX)
The first Qwen3.5-4B model quantized for on-device inference on iPhone via mlx-swift.
Built by APEX LEARN for the BECoach iOS app.
Model Details
| Property | Value |
|---|---|
| Base model | Qwen/Qwen3.5-4B |
| Quantization | 4-bit (4.503 bits/weight) |
| Framework | MLX (Apple Silicon) |
| Size on disk | ~2.4 GB |
| RAM at runtime | ~2.5 GB |
| License | Apache 2.0 |
What is BECoach?
BECoach is an on-device AI coaching assistant for iPhone. No cloud. No API calls. Pure edge inference powered by Apple's MLX framework running directly on the iPhone's neural engine.
Usage (iOS / mlx-swift)
import MLXLLM
let modelID = "apexlearn/BECoach-Qwen3.5-4B-4bit-mlx"
let config = ModelConfiguration(id: modelID)
let model = try await LLMModelFactory.shared.loadContainer(configuration: config)
Usage (Python / mlx-lm)
from mlx_lm import load, generate
model, tokenizer = load("apexlearn/BECoach-Qwen3.5-4B-4bit-mlx")
response = generate(model, tokenizer, prompt="Hello, how can you help me?")
print(response)
Device Compatibility
| Device | RAM | Status |
|---|---|---|
| iPhone 16 Pro / Pro Max | 8 GB | ✅ Recommended |
| iPhone 15 Pro / Pro Max | 8 GB | ✅ Supported |
| iPhone 15 / 16 (standard) | 6 GB | ⚠️ May hit memory pressure |
| iPhone 14 and earlier | ≤6 GB | ❌ Not recommended |
| iPad Pro M1+ | 8–16 GB | ✅ Works well |
| Mac (Apple Silicon) | Any | ✅ Full performance |
Conversion
Converted from Qwen/Qwen3.5-4B using mlx-lm:
python3 -m mlx_lm.convert \
--hf-path Qwen/Qwen3.5-4B \
--mlx-path ./BECoach-Qwen3.5-4B-4bit-mlx \
--quantize \
--q-bits 4
License
Apache 2.0 — same as the base Qwen3.5 model.
- Library
- mlx
- Type
- qwen3_5
- License
- apache-2.0
- Languages
- en, zh
- Created
- Mar 3, 2026
- Updated
- Mar 3, 2026