This is a LoRA (Low-Rank Adaptation) fine-tuned version of T5-small optimized for text summarization. The model was trained on the XSum dataset for abstractive summarization.

Usage example

Plain text inference

python

from peft import PeftModel
from transformers import AutoModelForSeq2SeqLM
from transformers import AutoTokenizer
import torch

base_model = AutoModelForSeq2SeqLM.from_pretrained("t5-small")
my_model = PeftModel.from_pretrained(base_model, "Lakshan2003/finetuned-t5-xsum")

def test_peft_summarizer(text, model, max_length=128, min_length=30):
    """
    Test the PEFT-loaded summarization model
    
    Args:
        text (str): Input text to summarize
        model: The loaded PEFT model
        max_length (int): Maximum length of the summary
        min_length (int): Minimum length of the summary
    """
    # Load tokenizer for t5-small (base model)
    tokenizer = AutoTokenizer.from_pretrained("Lakshan2003/finetuned-t5-xsum")
    
    # Move model to GPU if available
    device = "cuda" if torch.cuda.is_available() else "cpu"
    model = model.to(device)
    
    # Prepare the input text
    prefix = "summarize: "
    input_text = prefix + text
    
    # Tokenize
    inputs = tokenizer(input_text, return_tensors="pt", max_length=512, truncation=True)
    inputs = {k: v.to(device) for k, v in inputs.items()}
    
    # Generate summary
    with torch.no_grad():
        output_ids = model.generate(
            input_ids=inputs["input_ids"],
            attention_mask=inputs["attention_mask"],
            max_length=max_length,
            min_length=min_length,
            num_beams=4,
            length_penalty=2.0,
            early_stopping=True,
            no_repeat_ngram_size=3
        )
    
    # Decode the summary
    summary = tokenizer.decode(output_ids[0], skip_special_tokens=True)
    
    return summary

# Test text
test_text = """
The United Nations has warned that climate change poses an unprecedented threat to human civilization. In a landmark report, scientists detailed how rising temperatures are affecting everything from weather patterns to food production. The report emphasizes that without immediate and substantial action to reduce greenhouse gas emissions, the world faces severe consequences including rising sea levels, more frequent extreme weather events, and widespread ecosystem collapse. Many countries have pledged to reduce their carbon emissions, but experts say current commitments fall short of what's needed to prevent the worst impacts of climate change. The report also highlights the disproportionate effect of climate change on developing nations, which often lack the resources to adapt to changing conditions.
"""

# Generate summary
summary = test_peft_summarizer(test_text, my_model)

print("Original Text:")
print(test_text)
print("\nGenerated Summary:")
print(summary)

Intended uses & limitations

More information needed

Training and evaluation data

More information needed

Training procedure

Training hyperparameters

The following hyperparameters were used during training:

learning_rate: 2e-05
train_batch_size: 4
eval_batch_size: 4
seed: 42
gradient_accumulation_steps: 2
total_train_batch_size: 8
optimizer: Use adamw_torch with betas=(0.9,0.999) and epsilon=1e-08 and optimizer_args=No additional optimizer arguments
lr_scheduler_type: linear
num_epochs: 1
mixed_precision_training: Native AMP

Framework versions

PEFT 0.14.0
Transformers 4.47.0
Pytorch 2.5.1+cu121
Datasets 3.2.0
Tokenizers 0.21.0