---
license: cc-by-4.0
language:
- am
- ru
- en
- uk
- de
- ar
- zh
- es
- hi
datasets:
- s-nlp/ru_paradetox
- s-nlp/paradetox
- textdetox/multilingual_paradetox
library_name: transformers
pipeline_tag: text2text-generation
---

 # mT0-XL-detox-orpo

 **Resources**:
* [Paper](https://arxiv.org/abs/2407.05449)
* [GitHub with training scripts and data](https://github.com/s-nlp/multilingual-transformer-detoxification)

 ## Model Information
This is a multilingual 3.7B text detoxification model for 9 languages built on [TextDetox 2024 shared task](https://pan.webis.de/clef24/pan24-web/text-detoxification.html) based on [mT0-XL](https://huggingface.co/bigscience/mt0-xl). The model was trained in a two-step setup: the first step is full fine-tuning on different parallel text detoxification datasets, and the second step is ORPO alignment on a self-annotated preference dataset collected using toxicity and similarity classifiers. See the paper for more details.

In terms of human evaluation, the model is a second-best approach on the [TextDetox 2024 shared task](https://pan.webis.de/clef24/pan24-web/text-detoxification.html). More precisely, the model shows state-of-the-art performance for the Ukrainian language, top-2 scores for Arabic, and near state-of-the-art performance for other languages.

 ## Example usage

 ```python
from transformers import AutoTokenizer, AutoModelForSeq2SeqLM

 model = AutoModelForSeq2SeqLM.from_pretrained('s-nlp/mt0-xl-detox-orpo', device_map="auto")
tokenizer = AutoTokenizer.from_pretrained('s-nlp/mt0-xl-detox-orpo')

 LANG_PROMPTS = {
    'zh': '排毒：',
    'es': 'Desintoxicar: ',
    'ru': 'Детоксифицируй: ',
    'ar': 'إزالة السموم: ',
    'hi': 'विषहरण: ',
    'uk': 'Детоксифікуй: ',
    'de': 'Entgiften: ',
    'am': 'መርዝ መርዝ: ',
    'en': 'Detoxify: ',
}

 def detoxify(text, lang, model, tokenizer):
    encodings = tokenizer(LANG_PROMPTS[lang] + text, return_tensors='pt').to(model.device)
    
    outputs = model.generate(**encodings.to(model.device), 
                             max_length=128,
                             num_beams=10,
                             no_repeat_ngram_size=3,
                             repetition_penalty=1.2,
                             num_beam_groups=5,
                             diversity_penalty=2.5,
                             num_return_sequences=5,
                             early_stopping=True,
                             )
    
    return tokenizer.batch_decode(outputs, skip_special_tokens=True)
```

## Citation
```
@misc{rykov2024smurfcatpan2024textdetox,
      title={SmurfCat at PAN 2024 TextDetox: Alignment of Multilingual Transformers for Text Detoxification}, 
      author={Elisei Rykov and Konstantin Zaytsev and Ivan Anisimov and Alexandr Voronin},
      year={2024},
      eprint={2407.05449},
      archivePrefix={arXiv},
      primaryClass={cs.CL},
      url={https://arxiv.org/abs/2407.05449}, 
}
```