---
title: zen4-pro
canonical_url: "https://www.modelscope.cn/models/zenlm/zen4-pro"
md_url: "https://www.modelscope.cn/models/zenlm/zen4-pro.md"
repository: zenlm/zen4-pro
last_updated: 2026-04-04
license: apache-2.0
pipeline_tag: text-generation
tasks:
  - text-generation
model_type:
  - qwen3_5
architectures:
  - Qwen3_5ForConditionalGeneration
base_model:
  - huihui-ai/Huihui-Qwen3.5-27B-abliterated
base_model_relation: finetune
parameters: 27.8B
tensor_type:
  - BF16
  - F32
library_name:
  - transformer
  - safetensors
  - pytorch
frameworks:
  - pytorch
language:
  - en
  - zh
  - ja
  - ko
  - fr
  - de
  - es
  - pt
  - ru
  - ar
downloads: 283
stars: 0
tags:
  - zen4
  - zenlm
  - hanzo
  - frontier-ai
  - abliterated
---

# zen4-pro

> zen4-pro - zenlm 在 ModelScope 开源的模型。Zen4 Pro is a 27B parameter language model from the Zen4 family by Zen LM and Hanzo AI.

zenlm/zen4-pro 是 ModelScope 魔搭社区上的 27.8B 参数text-generation模型，采用 apache-2.0 许可，基于 huihui-ai/Huihui-Qwen3.5-27B-abliterated 构建。

- **Repository**: zenlm/zen4-pro
- **License**: apache-2.0
- **Tasks**: text-generation
- **Parameters**: 27.8B
- **Base model**: huihui-ai/Huihui-Qwen3.5-27B-abliterated
- **Tags**: zen4, zenlm, hanzo, frontier-ai, abliterated
- **Downloads**: 283
- **Stars**: 0
- **Last updated**: 2026-04-04

Source: https://www.modelscope.cn/models/zenlm/zen4-pro

---

# Zen4 Pro

**Zen4 Pro** is a 27B parameter language model from the [Zen4 family](https://zenlm.org) by [Zen LM](https://huggingface.co/zenlm) and [Hanzo AI](https://hanzo.ai).

Built on abliterated (uncensored) weights with Zen4 Frontier architecture for unrestricted, open-ended AI assistance.

## Model Details

| Property | Value |
|----------|-------|
| **Parameters** | 27B total, 27B active |
| **Architecture** | Zen4 Frontier |
| **Context** | 262K tokens |
| **License** | APACHE-2.0 |
| **Family** | Zen4 |
| **Tier** | Medium |
| **Creator** | Zen LM / Hanzo AI |

## Usage

```python
from transformers import AutoModelForCausalLM, AutoTokenizer

model = AutoModelForCausalLM.from_pretrained("zenlm/zen4-pro", torch_dtype="auto")
tokenizer = AutoTokenizer.from_pretrained("zenlm/zen4-pro")

messages = [{"role": "user", "content": "Hello, who are you?"}]
text = tokenizer.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)
inputs = tokenizer(text, return_tensors="pt").to(model.device)
outputs = model.generate(**inputs, max_new_tokens=512)
print(tokenizer.decode(outputs[0][inputs.input_ids.shape[-1]:], skip_special_tokens=True))
```

## Zen4 Family

| Model | Parameters | Context | HuggingFace |
|-------|-----------|---------|-------------|
| Zen4 Nano | 0.8B | 262K | [zenlm/zen4-nano](https://huggingface.co/zenlm/zen4-nano) |
| Zen4 Micro | 2B | 262K | [zenlm/zen4-micro](https://huggingface.co/zenlm/zen4-micro) |
| Zen4 Mini | 4B | 262K | [zenlm/zen4-mini](https://huggingface.co/zenlm/zen4-mini) |
| Zen4 | 9B | 262K | [zenlm/zen4](https://huggingface.co/zenlm/zen4) |
| **Zen4 Pro** | **27B** | **262K** | [zenlm/zen4-pro](https://huggingface.co/zenlm/zen4-pro) |
| Zen4 Max | 35B MoE (3B active) | 262K | [zenlm/zen4-max](https://huggingface.co/zenlm/zen4-max) |
| Zen4 Coder Flash | 31B MoE (3B active) | 131K | [zenlm/zen4-coder-flash](https://huggingface.co/zenlm/zen4-coder-flash) |
| Zen4 Pro Max | 80B MoE (3B active) | 256K | [zenlm/zen4-pro-max](https://huggingface.co/zenlm/zen4-pro-max) |
| Zen4 Coder | 80B MoE (3B active) | 256K | [zenlm/zen4-coder](https://huggingface.co/zenlm/zen4-coder) |
| Zen4 Mega | 122B MoE (10B active) | 262K | [zenlm/zen4-mega](https://huggingface.co/zenlm/zen4-mega) |
| Zen4 Thunder | 230B MoE (10B active) | 1M | [zenlm/zen4-thunder](https://huggingface.co/zenlm/zen4-thunder) |
| Zen4 Storm | 456B MoE (45B active) | 1M | [zenlm/zen4-storm](https://huggingface.co/zenlm/zen4-storm) |
| Zen4 Titan | 744B MoE (40B active) | 128K | [zenlm/zen4-titan](https://huggingface.co/zenlm/zen4-titan) |
| Zen4 Ultra | 1.04T MoE (32B active) | 256K | [zenlm/zen4-ultra](https://huggingface.co/zenlm/zen4-ultra) |
| Zen4 Ultra Max | 1T MoE (50B active) | 128K | [zenlm/zen4-ultra-max](https://huggingface.co/zenlm/zen4-ultra-max) |

## Links

- [Zen LM](https://zenlm.org) | [Hanzo AI](https://hanzo.ai) | [Hanzo Chat](https://hanzo.chat)
- [All Zen Models](https://huggingface.co/zenlm)

---

*Zen AI: Clarity Through Intelligence*