GigaVerbo-v2-ablation-Synth-1.5B is a decoder-transformer natively pretrained in Portuguese. This model is part of an ablation study to measure the impact of our educational data filtering/augmentation strategy on the downstream performance of models trained with GigaVerbo-v2 and GigaVerbo-v2-synth. Gigaverbo-v2-ablation-Synth-1.5B was trained with ~46 billion tokens, those being a repetition of the synthetic data from Gigaverbo-v2-synth. This model has 1.5 billion parameters and a context length of 4096 tokens.
The main branch of this repository contains the final checkpoint saved at step 22,000. All other checkpoints are available as separate branches. To load a specific checkpoint, you can use the following code snippet:
python
1from transformers import AutoModelForCausalLM, AutoTokenizer
23model_id ="Polygl0t/GigaVerbo-v2-ablation-Synth-1.5B"4revision ="step-2000"# Change this to the desired checkpoint branch5tokenizer = AutoTokenizer.from_pretrained(model_id)6model = AutoModelForCausalLM.from_pretrained(model_id, revision=revision)
Or, you can access all the revisions for the models via the following code snippet:
python
1from huggingface_hub import list_repo_refs
2out = list_repo_refs("Polygl0t/GigaVerbo-v2-ablation-Synth-1.5B")3branches =[b.name for b in out.branches]4print(branches)
Intended Uses
The primary intended use of this model is to serve as a baseline for evaluating the impact of data quality and filtering on Portuguese language model performance. Researchers and practitioners can use this model as a reference point for further ablation studies or for comparison with other models trained on different data mixtures.
Basic usage
python
1from transformers import GenerationConfig, TextGenerationPipeline, AutoTokenizer, AutoModelForCausalLM
2import torch
34# Specify the model and tokenizer5model_id ="Polygl0t/GigaVerbo-v2-ablation-Synth-1.5B"6tokenizer = AutoTokenizer.from_pretrained(model_id)7model = AutoModelForCausalLM.from_pretrained(model_id)89# Specify the generation parameters as you like10generation_config = GenerationConfig(11**{12"do_sample":True,13"max_new_tokens":150,14"renormalize_logits":True,15"repetition_penalty":1.2,16"temperature":0.1,17"top_k":50,18"top_p":1.0,19"use_cache":True,20}21)2223device = torch.device("cuda"if torch.cuda.is_available()else"cpu")24generator = TextGenerationPipeline(model=model, task="text-generation", tokenizer=tokenizer, device=device)2526# Generate text27prompt ="A capital de Portugal é"28completion = generator(prompt, generation_config=generation_config)29print(completion[0]['generated_text'])
Evaluations
The table below compares our ablation models with checkpoints from the first Tucano series. Tucano models are a natural point of comparison because they were trained on Portuguese data of a similar nature and provide multiple checkpoints across different stages of training. To ensure a fair comparison, we select Tucano checkpoints that are closest to our ablation models in terms of both the number of training tokens seen (31B and 52B vs. 46B) and model size (1.1B and 2.4B parameters). We also include additional models for which reliable information on training data volume and model size is available and whose sizes are comparable to our ablation models. Performance is summarized using the NPM (Normalized Performance Metric), which provides a balanced aggregate view across tasks by normalizing each task’s score relative to its random baseline, thereby accounting for differences in task difficulty.
NPM
ARC Challenge
Calame
Global PIQA
HellaSwag
Lambada
GigaVerbo-v2 (EDU)
39.306
0.328
0.579
0.82
0.449
0.377
Curio-1.1b (1T + 150B)
39.156
0.304
0.592
0.75
0.495
0.467
Curio-1.1b (1T + 100B)
38.88
0.309
0.599
0.74
0.489
0.468
Curio-1.1b (1T + 50B)
38.057
0.294
0.589
0.74
0.48
0.469
GigaVerbo-v2 (EDU+Synth)
37.49
0.344
0.579
0.75
0.46
0.39
Curio-edu-1b1 (1T + 20B)
34.774
0.322
0.549
0.69
0.463
0.429
GigaVerbo-v2 (Synth)
33.864
0.326
0.561
0.72
0.439
0.339
Tucano-2b4 (500B)
33.551
0.304
0.503
0.73
0.488
0.324
Tucano-1b1 (250B)
29.124
0.301
0.489
0.68
0.441
0.284
Llama-3.2-1B (9T)
28.315
0.317
0.5
0.55
0.453
0.456
GigaVerbo-v2 (NonEDU)
28.049
0.256
0.565
0.65
0.383
0.352
Tucano-2b4 (52B)
27.433
0.274
0.456
0.71
0.412
0.248
GlorIA-1.3B (35B)
27.274
0.264
0.547
0.64
0.364
0.367
Carvalho_pt-gl-1.3B (26B + 5B)
26.746
0.27
0.534
0.63
0.385
0.336
Tucano-1b1 (52B)
24.927
0.284
0.464
0.64
0.401
0.257
⭐ GigaVerbo-v2 Ablations: The Impact of 46B Tokens of Educational & Synthetic Data ⭐
All individual benchmark scores and their evolution across training time can be found in the .plots folder.
GigaVerbo-v2 Ablation: Impact of Educational & Synthetic Data (46B tokens)
Cite as 🤗
latex
1@misc{correa2026tucano2cool,
2 title={{Tucano 2 Cool: Better Open Source LLMs for Portuguese}},
3 author={Nicholas Kluge Corr{\^e}a and Aniket Sen and Shiza Fatimah and Sophia Falk and Lennard Landgraf and Julia Kastner and Lucie Flek},
4 year={2026},
5 eprint={2603.03543},
6 archivePrefix={arXiv},
7 primaryClass={cs.CL},
8 url={https://arxiv.org/abs/2603.03543},
9}
Aknowlegments
Polyglot is a project funded by the Federal Ministry of Education and Research (BMBF) and the Ministry of Culture and Science of the State of North Rhine-Westphalia (MWK) as part of TRA Sustainable Futures (University of Bonn) and the Excellence Strategy of the federal and state governments.
We also 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
This model is licensed under the Apache License, Version 2.0. For more details, see the LICENSE file.
