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NorT5 base

The official release of a new generation of NorT5 language models described in paper NorBench — A Benchmark for Norwegian Language Models. Plese read the paper to learn more details about the model.

Other sizes:

• NorT5 xs (32M)
• NorT5 small (88M)
• NorT5 base (228M)
• NorT5 large (808M)

Encoder-only NorBERT siblings:

• NorBERT 3 xs (15M)
• NorBERT 3 small (40M)
• NorBERT 3 base (123M)
• NorBERT 3 large (323M)

Example usage

This model currently needs a custom wrapper from modeling_nort5.py, you should therefore load the model with trust_remote_code=True.

import torch
from transformers import AutoTokenizer, AutoModelForSeq2SeqLM

tokenizer = AutoTokenizer.from_pretrained("ltg/nort5-base", trust_remote_code=True)
model = AutoModelForSeq2SeqLM.from_pretrained("ltg/nort5-base", trust_remote_code=True)


# MASKED LANGUAGE MODELING

sentence = "Brukseksempel: Elektrisk oppvarming. Definisjonen på ordet oppvarming er: å[MASK_0]."
encoding = tokenizer(sentence)

input_tensor = torch.tensor([encoding.input_ids])
output_tensor = model.generate(input_tensor, decoder_start_token_id=7, eos_token_id=8)
tokenizer.decode(output_tensor.squeeze(), skip_special_tokens=True)

# should output: ' varme opp et rom.'


# PREFIX LANGUAGE MODELING
# you need to finetune this model or use `nort5-{size}-lm` model, which is finetuned on prefix language modeling

sentence = "Brukseksempel: Elektrisk oppvarming. Definisjonen på ordet oppvarming er (Wikipedia) "
encoding = tokenizer(sentence)

input_tensor = torch.tensor([encoding.input_ids])
output_tensor = model.generate(input_tensor, max_new_tokens=50, num_beams=4, do_sample=False)
tokenizer.decode(output_tensor.squeeze())

# should output: [BOS]ˈoppvarming, det vil si at det skjer en endring i temperaturen i et medium, f.eks. en ovn eller en radiator, slik at den blir varmere eller kaldere, eller at den blir varmere eller kaldere, eller at den blir

The following classes are currently implemented: AutoModel, AutoModelForSeq2SeqLM.

Cite us

@inproceedings{samuel-etal-2023-norbench,
 title = "{N}or{B}ench {--} A Benchmark for {N}orwegian Language Models",
 author = "Samuel, David and
 Kutuzov, Andrey and
 Touileb, Samia and
 Velldal, Erik and
 {\O}vrelid, Lilja and
 R{\o}nningstad, Egil and
 Sigdel, Elina and
 Palatkina, Anna",
 booktitle = "Proceedings of the 24th Nordic Conference on Computational Linguistics (NoDaLiDa)",
 month = may,
 year = "2023",
 address = "T{\'o}rshavn, Faroe Islands",
 publisher = "University of Tartu Library",
 url = "https://aclanthology.org/2023.nodalida-1.61",
 pages = "618--633",
 abstract = "We present NorBench: a streamlined suite of NLP tasks and probes for evaluating Norwegian language models (LMs) on standardized data splits and evaluation metrics. We also introduce a range of new Norwegian language models (both encoder and encoder-decoder based). Finally, we compare and analyze their performance, along with other existing LMs, across the different benchmark tests of NorBench.",
}