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+---
+language: "ca"
+tags:
+  - lm-head
+  - masked-lm
+  - catalan
+  - exbert
+license: mit
+---
+
+# Calbert: a Catalan Language Model
+
+## Introduction
+
+CALBERT is an open-source language model for Catalan pretrained on the ALBERT architecture.
+
+It is now available on Hugging Face in its `tiny-uncased` version (the one you're looking at) and `base-uncased` as well, and was pretrained on the [OSCAR dataset](https://traces1.inria.fr/oscar/).
+
+For further information or requests, please go to the [GitHub repository](https://github.com/codegram/calbert)
+
+## Pre-trained models
+
+| Model                               | Arch.          | Training data          |
+| ----------------------------------- | -------------- | ---------------------- |
+| `codegram` / `calbert-tiny-uncased` | Tiny (uncased) | OSCAR (4.3 GB of text) |
+| `codegram` / `calbert-base-uncased` | Base (uncased) | OSCAR (4.3 GB of text) |
+
+## How to use Calbert with HuggingFace
+
+#### Load Calbert and its tokenizer:
+
+```python
+from transformers import AutoModel, AutoTokenizer
+
+tokenizer = AutoTokenizer.from_pretrained("codegram/calbert-tiny-uncased")
+model = AutoModel.from_pretrained("codegram/calbert-tiny-uncased")
+
+model.eval() # disable dropout (or leave in train mode to finetune
+```
+
+#### Filling masks using pipeline
+
+```python
+from transformers import pipeline
+
+calbert_fill_mask  = pipeline("fill-mask", model="codegram/calbert-tiny-uncased", tokenizer="codegram/calbert-tiny-uncased")
+results = calbert_fill_mask("M'agrada [MASK] això")
+# results
+# [{'sequence': "[CLS] m'agrada molt aixo[SEP]", 'score': 0.4403671622276306, 'token': 61},
+#  {'sequence': "[CLS] m'agrada més aixo[SEP]", 'score': 0.050061386078596115, 'token': 43},
+#  {'sequence': "[CLS] m'agrada veure aixo[SEP]", 'score': 0.026286985725164413, 'token': 157},
+#  {'sequence': "[CLS] m'agrada bastant aixo[SEP]", 'score': 0.022483550012111664, 'token': 2143},
+#  {'sequence': "[CLS] m'agrada moltíssim aixo[SEP]", 'score': 0.014491282403469086, 'token': 4867}]
+
+```
+
+#### Extract contextual embedding features from Calbert output
+
+```python
+import torch
+# Tokenize in sub-words with SentencePiece
+tokenized_sentence = tokenizer.tokenize("M'és una mica igual")
+# ['▁m', "'", 'es', '▁una', '▁mica', '▁igual']
+
+# 1-hot encode and add special starting and end tokens
+encoded_sentence = tokenizer.encode(tokenized_sentence)
+# [2, 109, 7, 71, 36, 371, 1103, 3]
+# NB: Can be done in one step : tokenize.encode("M'és una mica igual")
+
+# Feed tokens to Calbert as a torch tensor (batch dim 1)
+encoded_sentence = torch.tensor(encoded_sentence).unsqueeze(0)
+embeddings, _ = model(encoded_sentence)
+embeddings.size()
+# torch.Size([1, 8, 312])
+embeddings.detach()
+# tensor([[[-0.2726, -0.9855,  0.9643,  ...,  0.3511,  0.3499, -0.1984],
+#         [-0.2824, -1.1693, -0.2365,  ..., -3.1866, -0.9386, -1.3718],
+#         [-2.3645, -2.2477, -1.6985,  ..., -1.4606, -2.7294,  0.2495],
+#         ...,
+#         [ 0.8800, -0.0244, -3.0446,  ...,  0.5148, -3.0903,  1.1879],
+#         [ 1.1300,  0.2425,  0.2162,  ..., -0.5722, -2.2004,  0.4045],
+#         [ 0.4549, -0.2378, -0.2290,  ..., -2.1247, -2.2769, -0.0820]]])
+```
+
+## Authors
+
+CALBERT was trained and evaluated by [Txus Bach](https://twitter.com/txustice), as part of [Codegram](https://www.codegram.com)'s applied research.
+
+<a href="https://huggingface.co/exbert/?model=codegram/calbert-tiny-uncased&modelKind=bidirectional&sentence=M%27agradaria%20força%20saber-ne%20més">
+	<img width="300px" src="https://hf-dinosaur.huggingface.co/exbert/button.png">
+</a>