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Model: cmz1024/OLMo3-190M-zh-v3.1
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---
license: apache-2.0
language:
- zh
tags:
- pretrained
- olmo3
- chinese
- continue-pretrain
- mid-training
library_name: transformers
pipeline_tag: text-generation
base_model: allenai/Olmo-3-1025-7B
datasets:
- openbmb/Ultra-FineWeb
- opencsg/chinese-cosmopedia
- wikimedia/wikipedia
---
# OLMo3-190M-zh-v3.1
**中文 continue-pretrain 教学模型**,基于 OLMo3-190M 架构,在 v3 (from-scratch pretrain) 之上注入 **事实密度高的中文语料**Wikipedia-zh + Cosmopedia-Chinese
> **活水 42ailab 出品**。配套于《零基础 AI 大模型研发训练营》第 04 讲:预训练。
## 来源与动机
v3.1 的目标是**验证 continue pretrain 这个工业级技术**:在已有 base model 上继续训练 1-2B tokens以低成本**~$14 / 3h H100**)改善特定能力。
**对比 v3原 base→ v3.1 的 7-prompt 抽测**
| Prompt | v3 | v3.1 | 变化 |
|---|---|---|---|
| 人工智能是 | 🟢 | 🟢 | 持平 |
| 北京大学位于 | 🔴 "江苏省" | 🟢 **"北京市"** | ✅ 关键质变 |
| Python 是一种 | 🔴 "开源库" | 🟡 "开源的可扩展代码" + 能写代码 | ✅ 改善 |
| 中国古代四大发明是 | 🔴 | 🔴 | 持平190M 物理天花板)|
| 其他 3 个 | 🟡×3 | 🟡×3 + 1 退步 | — |
| **合计** | **1🟢 3🟡 3🔴** | **2🟢 3🟡 2🔴** | **+1 绿** |
关键 takeaways
-**事实密度策略有效**wiki + Cosmopedia 让"北京大学"跨过了 190M 模型的记忆阈值。
- ⚠️ **190M 参数有记忆天花板**"四大发明"即便在语料中存在,曝光次数不够就学不会。
- ⚠️ **未清洗的 Wiki 会引入格式污染**:红楼梦 prompt 出现"林黛玉、林黛玉、林黛玉的妹妹"重复——已作为 v4 必修项。
## 架构
基于 **OLMo3-190M canonical** 架构(和 allenai/Olmo-3 同宗,但从零训练 + continue pretrain
| 字段 | 值 |
|---|---|
| `architectures` | `["Olmo3ForCausalLM"]` |
| `hidden_size` | 768 |
| `num_hidden_layers` | 12 |
| `num_attention_heads` | 12 |
| `intermediate_size` | 3072 |
| `sliding_window` | 4096 (每 4 层 full attention) |
| `vocab_size` | 48000 (自训 48k 中文 BPE) |
| `max_position_embeddings` | 4096 |
| `total params` | ~187M |
## 使用
### 最简用法(路径 A
```python
from transformers import AutoModelForCausalLM, AutoTokenizer
tok = AutoTokenizer.from_pretrained("42ailab/OLMo3-190M-zh-v3.1")
model = AutoModelForCausalLM.from_pretrained("42ailab/OLMo3-190M-zh-v3.1")
inputs = tok("北京大学位于", return_tensors="pt")
outputs = model.generate(**inputs, max_new_tokens=50, temperature=0.8, top_p=0.9)
print(tok.decode(outputs[0], skip_special_tokens=True))
```
### 用于 SFT推荐用法L05 课程路径)
v3.1 是 **base model**,没有对话能力。上 SFT 就是:
```python
from transformers import AutoModelForCausalLM
# 作为 SFT 基座
model = AutoModelForCausalLM.from_pretrained("42ailab/OLMo3-190M-zh-v3.1")
# ... 用 TRL SFTTrainer 训练
```
### 国内加速
```bash
export HF_ENDPOINT=https://hf-mirror.com
# 或用 ModelScopehttps://modelscope.cn/models/42ailab/OLMo3-190M-zh-v3.1
```
## 训练配方
### 数据混合1.19B tokens effective
| 数据源 | HF 路径 | tokens | % |
|---|---|---|---|
| v3 replay | 自 merged_raw 抽样 30% | 300M | 27% |
| Wikipedia-zh | `wikimedia/wikipedia` config `20231101.zh` | 394M | 35% |
| Cosmopedia-Chinese | `opencsg/chinese-cosmopedia` | 500M | 45% |
(原计划加入 `bigcode/the-stack-v2` 代码和 `liwu/MNBVC` 事实补刀,但两者在 HF datasets 3.0+ 中因 script-based loading 失效。v4 会用 Parquet-native 替代。)
### 超参
- Base: v3 final checkpoint
- Peak lr: **2e-4**v3 peak 5e-4 的 2/5
- Warmup: **500 steps** 显式(从 ~0 线性爬升)
- Scheduler: cosine decay to 2e-5
- Batch: 16 × 2048 × grad_accum 8 = **262K tokens/step**
- Max steps: 5700
- Duration: **3h 00min** on H100
- Attention: **SDPA**OLMo3 SWA + flash-attn-2 有 `s_aux` None bugcontinue pretrain 场景必须 SDPA
### Loss 轨迹
| step | train loss |
|---|---|
| 0 | 3.33 |
| 500 (warmup done) | 2.97 |
| 1500 | 2.87 |
| 3000 | 2.81 |
| 4500 | 2.80 |
| 5700 (final) | **2.85 mean** |
对比 v3 final mean loss **3.95** → v3.1 **-28%**。
## 限制
1. **事实记忆上限**190M 参数约能稳定记住 ~1000-2000 个事实。"四大发明"等低曝光事实仍会错。
2. **无 code 数据**Stage-2 计划中的代码数据源因 HF gated / script-based 问题未加入。"Python 是编程语言"仍偶有漂移。
3. **未做 SFT**v3.1 是纯 base model不会对话。对话任务需额外做 SFT。
4. **eval 数字偏乐观**:训练时 eval/loss = 2.00 是在 in-domain 数据上算的wiki + Cosmopedia 尾部),不能直接对比 v3 的 3.61 held-out eval。
## License
- **模型权重**Apache-2.0(允许商用)
- **训练数据**:混合 license
- FineWeb-Edu-Chinese V2.2、Ultra-FineWeb、Cosmopedia-ChineseApache-2.0
- **Wikipedia-zh****CC-BY-SA-3.0 + GFDL**share-alike 传染性,商用前请咨询法律)
按 Allen AI OLMo 社区实践:权重本身声明 Apache-2.0,但披露训练数据含 CC-BY-SA 内容。
## Citation
```bibtex
@misc{huoshui-olmo3-190m-zh-v3.1,
title={OLMo3-190M-zh-v3.1: Chinese Continue-Pretrained Teaching Model},
author={活水 AI 实验室 (42ailab) and 阳志平},
year={2026},
howpublished={\url{https://huggingface.co/42ailab/OLMo3-190M-zh-v3.1}},
note={LLM001 Course, Lecture 04}
}
```
## 配套资源
- **数据集**[`42ailab/llm101-v3.1-data`](https://huggingface.co/datasets/42ailab/llm101-v3.1-data) — tokenizer + tokenized.bin + nano 子集 + 7-prompt 评测对照
- **课程仓库**https://cnb.cool/42edu/LLM001/llm001
- **讲师笔记**`demo/ch04/OLMo3-190M-zh-v3.1/teaching_notes.md`

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{% for message in messages %}{% if message['role'] == 'system' %}<|im_start|>system
{{ message['content'] }}<|im_end|>
{% elif message['role'] == 'user' %}<|im_start|>user
{{ message['content'] }}<|im_end|>
{% elif message['role'] == 'assistant' %}{% generation %}<|im_start|>assistant
{{ message['content'] }}<|im_end|>
{% endgeneration %}{% endif %}{% endfor %}{% if add_generation_prompt %}<|im_start|>assistant
{% endif %}

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{
"architectures": [
"Olmo3ForCausalLM"
],
"attention_bias": false,
"attention_dropout": 0.0,
"attn_implementation": "sdpa",
"bos_token_id": 2,
"dtype": "bfloat16",
"eos_token_id": 0,
"hidden_act": "silu",
"hidden_size": 768,
"initializer_range": 0.02,
"intermediate_size": 3072,
"layer_types": [
"sliding_attention",
"sliding_attention",
"sliding_attention",
"full_attention",
"sliding_attention",
"sliding_attention",
"sliding_attention",
"full_attention",
"sliding_attention",
"sliding_attention",
"sliding_attention",
"full_attention"
],
"max_position_embeddings": 4096,
"model_type": "olmo3",
"num_attention_heads": 12,
"num_hidden_layers": 12,
"num_key_value_heads": 12,
"pad_token_id": 1,
"rms_norm_eps": 1e-06,
"rope_parameters": {
"rope_theta": 500000,
"rope_type": "default"
},
"sliding_window": 4096,
"tie_word_embeddings": false,
"transformers_version": "5.6.0",
"use_cache": false,
"vocab_size": 48000
}

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"output_attentions": false,
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"use_cache": true
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{
"bos_token": "<|bos|>",
"eos_token": "<|endoftext|>",
"pad_token": "<|pad|>",
"unk_token": "<|unk|>"
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"tokenizer_class": "PreTrainedTokenizerFast",
"bos_token": "<|bos|>",
"eos_token": "<|endoftext|>",
"pad_token": "<|pad|>",
"unk_token": "<|unk|>",
"add_bos_token": false,
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"clean_up_tokenization_spaces": false,
"model_max_length": 4096,
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}

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