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README.md
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---
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license: apache-2.0
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language:
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- ru
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- en
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library_name: transformers
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pipeline_tag: feature-extraction
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---
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# BERT-base
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<!-- Provide a quick summary of what the model is/does. -->
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Pretrained bidirectional encoder for russian language.
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The model was trained using standard MLM objective on large text corpora including open social data.
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See `Training Details` section for more information.
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⚠️ This model contains only the encoder part without any pretrained head.
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- **Developed by:** [deepvk](https://vk.com/deepvk)
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- **Model type:** BERT
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- **Languages:** Mostly russian and small fraction of other languages
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- **License:** Apache 2.0
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## How to Get Started with the Model
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```python
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from transformers import AutoTokenizer, AutoModel
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tokenizer = AutoTokenizer.from_pretrained("deepvk/bert-base-uncased")
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model = AutoModel.from_pretrained("deepvk/bert-base-uncased")
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text = "Привет, мир!"
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inputs = tokenizer(text, return_tensors='pt')
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predictions = model(**inputs)
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```
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## Training Details
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The model was trained using the NVIDIA source code. See the [pretraining documentation](https://github.com/NVIDIA/DeepLearningExamples/blob/master/PyTorch/LanguageModeling/BERT/README.md#training-process) for details.
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### Training Data
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250 GB of filtered texts in total.
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A mix of the following data: Wikipedia, Books and Social corpus.
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### Architecture details
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| Argument | Value |
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|-------------------------|----------------|
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|Encoder layers | 12 |
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|Encoder attention heads | 12 |
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|Encoder embed dim | 768 |
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|Encoder ffn embed dim | 3,072 |
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|Activation function | GeLU |
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|Attention dropout | 0.1 |
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|Dropout | 0.1 |
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|Max positions | 512 |
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|Vocab size | 36000 |
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|Tokenizer type | BertTokenizer |
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## Evaluation
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We evaluated the model on [Russian Super Glue](https://russiansuperglue.com/) dev set.
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The best result in each task is marked in bold.
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All models have the same size except the distilled version of DeBERTa.
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| Model | RCB | PARus | MuSeRC | TERRa | RUSSE | RWSD | DaNetQA | Score |
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|------------------------------------------------------------------------|-----------|--------|---------|-------|---------|---------|---------|-----------|
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| [vk-deberta-distill](https://huggingface.co/deepvk/deberta-v1-distill) | 0.433 | 0.56 | 0.625 | 0.59 | 0.943 | 0.569 | 0.726 | 0.635 |
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| [vk-roberta-base](https://huggingface.co/deepvk/roberta-base) | 0.46 | 0.56 | 0.679 | 0.769 | 0.960 | 0.569 | 0.658 | 0.665 |
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| [vk-deberta-base](https://huggingface.co/deepvk/deberta-v1-base) | 0.450 |**0.61**|**0.722**| 0.704 | 0.948 | 0.578 |**0.76** |**0.682** |
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| [vk-bert-base](https://huggingface.co/deepvk/bert-base-uncased) | 0.467 | 0.57 | 0.587 | 0.704 | 0.953 |**0.583**| 0.737 | 0.657 |
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| [sber-bert-base](https://huggingface.co/ai-forever/ruBert-base) | **0.491** |**0.61**| 0.663 | 0.769 |**0.962**| 0.574 | 0.678 | 0.678 |
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