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---
language: vi
tags:
- hate-speech-detection
- vietnamese
- phobert
license: apache-2.0
datasets:
- visolex/ViHOS
metrics:
- precision
- recall
- f1
model-index:
- name: phobert-hsd-span
results:
- task:
type: token-classification
name: Hate Speech Span Detection
dataset:
name: ViHOS
type: custom
metrics:
- name: Precision
type: precision
value: <INSERT_PRECISION>
- name: Recall
type: recall
value: <INSERT_RECALL>
- name: F1 Score
type: f1
value: <INSERT_F1>
base_model:
- vinai/phobert-base
pipeline_tag: token-classification
---
# PhoBERT-HSD-Span
Fine-tuned from [`vinai/phobert-base`](https://huggingface.co/vinai/phobert-base) on **visolex/ViHOS** for token-level hate/offensive span detection.
## Model Details
* **Base Model**: [`vinai/phobert-base`](https://huggingface.co/vinai/phobert-base)
* **Dataset**: [visolex/ViHOS](https://huggingface.co/datasets/visolex/ViHOS)
* **Fine-tuning**: HuggingFace Transformers
### Hyperparameters
* Batch size: `16`
* Learning rate: `5e-5`
* Epochs: `100`
* Max sequence length: `128`
* Early stopping: `5`
## Usage
```python
from transformers import AutoTokenizer, AutoModelForTokenClassification
tokenizer = AutoTokenizer.from_pretrained("visolex/phobert-hsd-span")
model = AutoModelForTokenClassification.from_pretrained("visolex/phobert-hsd-span")
text = "Nói cái lol . t thấy thô tục vl"
inputs = tokenizer(text, return_tensors="pt", truncation=True, padding=True)
with torch.no_grad():
outputs = model(**inputs)
logits = outputs.logits # [batch, seq_len, num_labels]
# For binary: use sigmoid, for multi-class: use softmax+argmax
probs = torch.sigmoid(logits)
preds = (probs > 0.5).long().squeeze().tolist() # [seq_len]
tokens = tokenizer.convert_ids_to_tokens(inputs['input_ids'][0])
span_labels = [p[0] for p in preds]
span_tokens = [token for token, label in zip(tokens, span_labels) if label == 1 and token not in ['<s>', '</s>']]
print("Span tokens:", span_tokens)
print("Span text:", tokenizer.convert_tokens_to_string(span_tokens))
```
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