---
language:
- 'no'
- nb
- nn
inference: false
tags:
- BERT
- NorBERT
- Norwegian
- encoder
license: cc-by-4.0
---

# NorBERT 3 base

<img src="https://huggingface.co/ltg/norbert3-base/resolve/main/norbert.png" width=12.5%>

The official release of a new generation of NorBERT language models described in paper [**NorBench — A Benchmark for Norwegian Language Models**](https://openreview.net/forum?id=WgxNONkAbz). Plese read the paper to learn more details about the model.


## Other sizes:
- [NorBERT 3 xs (15M)](https://huggingface.co/ltg/norbert3-xs)
- [NorBERT 3 small (40M)](https://huggingface.co/ltg/norbert3-small)
- [NorBERT 3 base (123M)](https://huggingface.co/ltg/norbert3-base)
- [NorBERT 3 large (323M)](https://huggingface.co/ltg/norbert3-large)

## Generative NorT5 siblings:
- [NorT5 xs (15M)](https://huggingface.co/ltg/nort5-xs)
- [NorT5 small (40M)](https://huggingface.co/ltg/nort5-small)
- [NorT5 base (123M)](https://huggingface.co/ltg/nort5-base)
- [NorT5 large (323M)](https://huggingface.co/ltg/nort5-large)


## Example usage

This model currently needs a custom wrapper from `modeling_norbert.py`. Then you can use it like this:

```python
import torch
from transformers import AutoTokenizer
from modeling_norbert import NorbertForMaskedLM

tokenizer = AutoTokenizer.from_pretrained("path/to/folder")
bert = NorbertForMaskedLM.from_pretrained("path/to/folder")

mask_id = tokenizer.convert_tokens_to_ids("[MASK]")
input_text = tokenizer("Nå ønsker de seg en[MASK] bolig.", return_tensors="pt")
output_p = bert(**input_text)
output_text = torch.where(input_text.input_ids == mask_id, output_p.logits.argmax(-1), input_text.input_ids)

# should output: '[CLS] Nå ønsker de seg en ny bolig.[SEP]'
print(tokenizer.decode(output_text[0].tolist()))
```

The following classes are currently implemented: `NorbertForMaskedLM`, `NorbertForSequenceClassification`, `NorbertForTokenClassification`, `NorbertForQuestionAnswering` and `NorbertForMultipleChoice`.

## Cite us

```bibtex
@inproceedings{
samuel2023norbench,
title={NorBench -- A Benchmark for Norwegian Language Models},
author={David Samuel and Andrey Kutuzov and Samia Touileb and Erik Velldal and Lilja {\O}vrelid and Egil R{\o}nningstad and Elina Sigdel and Anna Sergeevna Palatkina},
booktitle={The 24rd Nordic Conference on Computational Linguistics},
year={2023},
url={https://openreview.net/forum?id=WgxNONkAbz}
}
```