metadata

language:
  - pt
license: apache-2.0
library_name: transformers
tags:
  - text-generation-inference
datasets:
  - TucanoBR/GigaVerbo
metrics:
  - perplexity
pipeline_tag: text-generation
widget:
  - text: A floresta da Amazônia é conhecida por sua
    example_title: Exemplo
  - text: Uma das coisas que Portugal, Angola, Brasil e Moçambique tem em comum é o
    example_title: Exemplo
  - text: O Carnaval do Rio de Janeiro é
    example_title: Exemplo
inference:
  parameters:
    repetition_penalty: 1.2
    temperature: 0.2
    top_k: 20
    top_p: 0.2
    max_new_tokens: 150
co2_eq_emissions:
  emissions: 89730
  source: CodeCarbon
  training_type: pre-training
  geographical_location: Germany
  hardware_used: NVIDIA A100-SXM4-80GB

Tucano-160m

Model Summary

Tucano is a series of decoder-transformers based on the Llama 2 architecture, pretrained natively in Portuguese. All Tucano models were trained on GigaVerbo, a concatenation of deduplicated Portuguese text corpora amounting to 200 billion tokens.

Read our preprint here.

Details

Architecture: a Transformer-based model pre-trained via causal language modeling
Size: 162,417,408 parameters
Context length: 2048 tokens
Dataset: TucanoBR/GigaVerbo
Language: Portuguese
Number of steps: 320,000
GPU: 8 NVIDIA A100-SXM4-80GB
Training time: ~ 44 hours
Emissions: 89.73 KgCO2 (Germany)
Total energy consumption: 235.54 kWh

This repository has the source code used to train this model. The main libraries used are:

Intended Uses

The primary intended use of the Tucano models is to serve as foundations for research and development involving native Portuguese language modeling. Checkpoints saved during training are designed to provide a controlled setting for performing comparative experiments, specifically regarding the effects of active pretraining on the performance of currently available benchmarks. You may also fine-tune and adapt Tucano models for deployment if your use follows the Apache 2.0 license. If you decide to use the Tucano models as a basis for your fine-tuned model, please conduct your own risk and bias assessment.

Out-of-scope Use

Tucano models are not intended for deployment. They are not an out-of-the-box product and should not be used for human-facing interactions.
Tucano models are for the Portuguese language only and are unsuitable for text generation tasks in other languages.
Tucano models have not been fine-tuned for downstream tasks.

Basic usage

Using the pipeline:

from transformers import pipeline

generator = pipeline("text-generation", model="TucanoBR/Tucano-160m")

completions  = generator("A floresta da Amazônia é conhecida por sua", num_return_sequences=2, max_new_tokens=100)

for comp in completions:
  print(f"🤖 {comp['generated_text']}")

Using the AutoTokenizer and AutoModelForCausalLM:

from transformers import AutoTokenizer, AutoModelForCausalLM
import torch

tokenizer = AutoTokenizer.from_pretrained("TucanoBR/Tucano-160m", revision='main')
model = AutoModelForCausalLM.from_pretrained("TucanoBR/Tucano-160m", revision='main')

device = torch.device("cuda" if torch.cuda.is_available() else "cpu")

model.eval()
model.to(device)

inputs = tokenizer("A floresta da Amazônia é conhecida por sua", return_tensors="pt").to(device)

completions = model.generate(**inputs, num_return_sequences=2, max_new_tokens=100)

for i, completion in enumerate(completions):
    print(f'🤖 {tokenizer.decode(completion)}')

Limitations

Like almost all other language models trained on large text datasets scraped from the web, the Tucano models show behavior that does not make them an out-of-the-box solution to many real-world applications, especially those requiring factual, reliable, and nontoxic text generation. Tucano models are all subject to the following:

Hallucinations: Tucano models can produce content that can be mistaken as true facts, but are misleading or entirely false, i.e., hallucination.
Biases and Toxicity: Tucano models inherit the social and historical stereotypes from the data used to train them. Given these biases, the model can produce toxic content, i.e., harmful, offensive, or detrimental to individuals, groups, or communities.
Unreliable Code: Tucano models may produce incorrect code snippets and statements. These code generations should not be treated as suggestions or accurate solutions.
Language Limitations: Tucano models are primarily designed to interact with Portuguese. Other languages might challenge its comprehension, leading to potential misinterpretations or errors in response.
Repetition and Verbosity: Tucano models may get stuck on repetition loops (especially if the repetition penalty during generations is set to a meager value) or produce verbose responses unrelated to the prompt it was given.

Hence, even though our models are released with a permissive license, we urge users to perform their risk analysis on them if they intend to use them for real-world applications. We also have humans moderating the outputs of these models in applications where they will interact with an audience, guaranteeing users are always aware they are interacting with a language model.

Evaluations

The table below compares our models against several Portuguese and multilingual language models on the evaluation harness used in our study. More information on it can be found here. To learn more about our evaluation harness selection, read our preprint.

	Average	Calame-PT	Lambada-PT	Assin2 RTE	Assin2 STS	ARC-PT	HellaSwag-PT
Tucano-1b1	41.94	58.24	34.7	60.82	24.63	30.43	42.84
Llama-3.2-1B	40.34	51.83	41.02	50.77	19.48	33.5	45.44
Bloom-1b1	36.95	52.94	30.22	54.32	14.64	29.83	39.74
Bloom-1b7	36.65	55.64	31.98	53.6	4.81	30.34	43.52
Tucano-630m	36.29	56.55	33.13	57.79	1.99	28.89	39.41
Xglm-564m	35.24	50.58	27.42	49.9	23.35	25.56	34.64
TTL-460m	33.62	49.42	23.29	53.61	13	29.4	33
Tucano-1b1-Instruct	33.19	56.74	34.66	33.42	0.87	30.6	42.83
Tucano-160m	30.85	52.31	28.16	33.51	11.02	27.01	33.07
Bloom-560m	29.85	49.95	25.44	33.33	8.48	24.74	37.15
TTL-160m	29.56	46.72	20.98	53.97	0.24	26.15	29.29
GPorTuguese	25.45	40.61	22.98	33.59	3.44	22.48	29.62
GlórIA-1b3	24.42	52.79	27.71	0	2.32	26.67	37.04
mGPT-1b3	21.3	47.14	29.92	0	0.58	23.81	26.37
Lola-v1	18.93	11.19	26.40	0	0	30.42	45.61

Cite as 🤗

@misc{correa24tucano,
  title = {{Tucano: Advancing Neural Text Generation for Portuguese}},
  author = {Corr{\^e}a, Nicholas Kluge and Sen, Aniket and Falk, Sophia and Fatimah, Shiza},
  journal={arXiv preprint arXiv:xxxx.xxxxx},
  year={2024}
}

Aknowlegments

We gratefully acknowledge the granted access to the Marvin cluster hosted by University of Bonn along with the support provided by its High Performance Computing & Analytics Lab.

License

Tucano is licensed under the Apache License, Version 2.0. For more details, see the LICENSE file.