Bahasa Tiny-BERT Model

General Distilled Tiny BERT language model for Malay and Indonesian.

Pretraining Corpus

tiny-bert-bahasa-cased model was distilled on ~1.8 Billion words. We distilled on both standard and social media language structures, and below is list of data we distilled on,

  1. dumping wikipedia.
  2. local instagram.
  3. local twitter.
  4. local news.
  5. local parliament text.
  6. local singlish/manglish text.
  7. IIUM Confession.
  8. Wattpad.
  9. Academia PDF.

Preprocessing steps can reproduce from here, Malaya/pretrained-model/preprocess.

Distilling details

Load Distilled Model

You can use this model by installing torch or tensorflow and Huggingface library transformers. And you can use it directly by initializing it like this:

from transformers import AlbertTokenizer, BertModel

model = BertModel.from_pretrained('huseinzol05/tiny-bert-bahasa-cased')
tokenizer = AlbertTokenizer.from_pretrained(
    unk_token = '[UNK]',
    pad_token = '[PAD]',
    do_lower_case = False,

We use google/sentencepiece to train the tokenizer, so to use it, need to load from AlbertTokenizer.

Example using AutoModelWithLMHead

from transformers import AlbertTokenizer, AutoModelWithLMHead, pipeline

model = AutoModelWithLMHead.from_pretrained('huseinzol05/tiny-bert-bahasa-cased')
tokenizer = AlbertTokenizer.from_pretrained(
    unk_token = '[UNK]',
    pad_token = '[PAD]',
    do_lower_case = False,
fill_mask = pipeline('fill-mask', model = model, tokenizer = tokenizer)
print(fill_mask('makan ayam dengan [MASK]'))

Output is,

[{'sequence': '[CLS] makan ayam dengan berbual[SEP]',
  'score': 0.00015769545279908925,
  'token': 17859},
 {'sequence': '[CLS] makan ayam dengan kembar[SEP]',
  'score': 0.0001448775001335889,
  'token': 8289},
 {'sequence': '[CLS] makan ayam dengan memaklumkan[SEP]',
  'score': 0.00013484008377417922,
  'token': 6881},
 {'sequence': '[CLS] makan ayam dengan Senarai[SEP]',
  'score': 0.00013061291247140616,
  'token': 11698},
 {'sequence': '[CLS] makan ayam dengan Tiga[SEP]',
  'score': 0.00012453157978598028,
  'token': 4232}]


For further details on the model performance, simply checkout accuracy page from Malaya, https://malaya.readthedocs.io/en/latest/Accuracy.html, we compared with traditional models.


Thanks to Im Big, LigBlou, Mesolitica and KeyReply for sponsoring AWS, Google and GPU clouds to train BERT for Bahasa.

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Mask token: [MASK]
This model can be loaded on the Inference API on-demand.