distilbert-base-cased EU AI Act Compliance Profile

Model Card for DistilBERT base model (cased)

This model is a distilled version of the BERT base model. It was introduced in this paper. The code for the distillation process can be found here. This model is cased: it does make a difference between english and English.

All the training details on the pre-training, the uses, limitations and potential biases (included below) are the same as for DistilBERT-base-uncased. We highly encourage to check it if you want to know more.

Model description

DistilBERT is a transformers model, smaller and faster than BERT, which was pretrained on the same corpus in a self-supervised fashion, using the BERT base model as a teacher. This means it was pretrained on the raw texts only, with no humans labelling them in any way (which is why it can use lots of publicly available data) with an automatic process to generate inputs and labels from those texts using the BERT base model. More precisely, it was pretrained with three objectives:

• Distillation loss: the model was trained to return the same probabilities as the BERT base model.
• Masked language modeling (MLM): this is part of the original training loss of the BERT base model. When taking a sentence, the model randomly masks 15% of the words in the input then run the entire masked sentence through the model and has to predict the masked words. This is different from traditional recurrent neural networks (RNNs) that usually see the words one after the other, or from autoregressive models like GPT which internally mask the future tokens. It allows the model to learn a bidirectional representation of the sentence.
• Cosine embedding loss: the model was also trained to generate hidden states as close as possible as the BERT base model.

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