---
frameworks:
- Pytorch
license: other
license_name: glm-4
license_link: LICENSE
pipeline_tag: text-generation
tags:
- glm
- edge
- mlx
inference: false
base_model: THUDM/glm-edge-1.5b-chat
library_name: mlx
---

# GLM-Edge-1.5B-Chat (16-bit MLX Full-Precision)

This repository contains Zhipu AI's GLM-Edge-1.5B-Chat in its original unquantized 16-bit float (bfloat16) precision. It is compiled natively for Apple Silicon under the MLX framework.

16-bit precision operates with 0% quantization loss. It preserves the exact mathematical weights of the original model.

## Performance Benchmarks
*   **Inference Speed**: ~32.50 tokens per second (base M1 Apple Silicon)
*   **VRAM Footprint**: ~2.94 GB
*   **Memory Efficiency**: Highly optimized for M-series unified memory architecture. Runs smoothly on 8GB machines.

## Installation
Install the MLX LM package.
```bash
pip install mlx-lm
```

## Usage

### Command Line Interface
Chat with the model in your terminal.
```bash
mlx_lm.chat --model SirSahOl/glm-edge-1.5b-chat-mlx-16bit
```

### Python API
Load and generate text programmatically.
```python
from mlx_lm import load, generate

model, tokenizer = load("SirSahOl/glm-edge-1.5b-chat-mlx-16bit")

messages = [{"role": "user", "content": "Explain quantum superposition."}]
prompt = tokenizer.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)

response = generate(model, tokenizer, prompt=prompt, verbose=True)
```

## Multi-Quantization Comparison
Evaluate your hardware budget and choose the optimal precision:

| Variant | Disk Size | VRAM Footprint | M1 Speed | Key Advantage |
| :--- | :--- | :--- | :--- | :--- |
| **[4-bit MLX](https://huggingface.co/SirSahOl/glm-edge-1.5b-chat-mlx-4bit)** | ~800 MB | ~0.87 GB | ~72.5 tokens/sec | Maximum speed, lowest RAM. |
| **[8-bit MLX](https://huggingface.co/SirSahOl/glm-edge-1.5b-chat-mlx-8bit)** | ~1.56 GB | ~1.56 GB | ~48.5 tokens/sec | Lossless balance, highly stable reasoning. |
| **16-bit MLX** (This Repo) | ~2.94 GB | ~3.00 GB | **~32.5 tokens/sec** | Raw full-precision, absolute peak quality. |

## Limitations
*   Largest footprint of the three variants. Use only if raw precision and unquantized quality are critical for your tasks.

## LM Studio Configuration (Universal Preset Fix)
If you load this model in LM Studio, you must configure custom Stop Strings to prevent the model from entering an infinite self-dialogue loop.

### Option A: Automatic Preset (Recommended)
You can create a custom prompt preset to configure all settings automatically. Create a JSON file named `GLM-Edge.json` inside your LM Studio config directory:
*   **macOS / Linux**: `~/.lmstudio/config-presets/GLM-Edge.json`
*   **Windows**: `%USERPROFILE%\.lmstudio\config-presets\GLM-Edge.json`

Add the following JSON content:
```json
{
  "name": "GLM-Edge",
  "inference_params": {
    "pre_prompt": "You are a helpful, direct, and honest assistant.",
    "input_prefix": "<|user|>\n",
    "input_suffix": "\n<|assistant|>\n",
    "pre_prompt_prefix": "<|system|>\n",
    "pre_prompt_suffix": "\n",
    "antiprompt": [
      "<|user|>",
      "<|observation|>",
      "<|endoftext|>"
    ],
    "stopStrings": [
      "<|user|>",
      "<|observation|>",
      "<|endoftext|>"
    ],
    "temperature": 0.7,
    "max_tokens": 2048
  }
}
```
Restart LM Studio, open a Chat session, and select **"GLM-Edge"** from the Prompt Template dropdown.

### Option B: Manual Configuration
Alternatively, configure the settings manually in the **Advanced Configuration** sidebar:
1. **Stop Strings (Antiprompts / stopStrings)**: Add `<|user|>`, `<|observation|>`, and `<|endoftext|>`
2. **Prompt Formatting**:
   * **User Prefix**: `<|user|>\n`
   * **Assistant Suffix**: `\n<|assistant|>\n`
   * **System Prefix**: `<|system|>\n`
   * **System Suffix**: `\n`