# Fine-Tuned LLaMA-3-8B CEFR Model

This is a fine-tuned version of `unsloth/gemma-7b-bnb-4bit` for CEFR-level sentence generation, evaluated with a fine-tuned classifier from `Mr-FineTuner/Skripsi_validator_best_model`.

- **Base Model**: unsloth/gemma-7b-bnb-4bit
- **Fine-Tuning**: LoRA with SMOTE-balanced dataset
- **Training Details**:
  - Dataset: CEFR-level sentences with SMOTE and undersampling for balance
  - LoRA Parameters: r=32, lora_alpha=32, lora_dropout=0.5
  - Training Args: learning_rate=2e-5, batch_size=8, epochs=0.01, cosine scheduler
  - Optimizer: adamw_8bit
  - Early Stopping: Patience=3, threshold=0.01
- **Evaluation Metrics (Exact Matches)**:
  - CEFR Classifier Accuracy: 0.167
  - Precision (Macro): 0.028
  - Recall (Macro): 0.167
  - F1-Score (Macro): 0.048
- **Evaluation Metrics (Within ±1 Level)**:
  - CEFR Classifier Accuracy: 0.500
  - Precision (Macro): 0.375
  - Recall (Macro): 0.500
  - F1-Score (Macro): 0.400
- **Other Metrics**:
  - Perplexity: 5.344
  - Diversity (Unique Sentences): 0.100
  - Inference Time (ms): 5802.883
  - Model Size (GB): 4.8
  - Robustness (F1): 0.045
- **Confusion Matrix (Exact Matches)**:
  - CSV: [confusion_matrix_exact.csv](confusion_matrix_exact.csv)
  - Image: [confusion_matrix_exact.png](confusion_matrix_exact.png)
- **Confusion Matrix (Within ±1 Level)**:
  - CSV: [confusion_matrix_within1.csv](confusion_matrix_within1.csv)
  - Image: [confusion_matrix_within1.png](confusion_matrix_within1.png)
- **Per-Class Confusion Metrics (Exact Matches)**:
  - A1: TP=0, FP=0, FN=10, TN=50
  - A2: TP=10, FP=50, FN=0, TN=0
  - B1: TP=0, FP=0, FN=10, TN=50
  - B2: TP=0, FP=0, FN=10, TN=50
  - C1: TP=0, FP=0, FN=10, TN=50
  - C2: TP=0, FP=0, FN=10, TN=50
- **Per-Class Confusion Metrics (Within ±1 Level)**:
  - A1: TP=10, FP=0, FN=0, TN=50
  - A2: TP=10, FP=30, FN=0, TN=20
  - B1: TP=10, FP=0, FN=0, TN=50
  - B2: TP=0, FP=0, FN=10, TN=50
  - C1: TP=0, FP=0, FN=10, TN=50
  - C2: TP=0, FP=0, FN=10, TN=50
- **Usage**:
  ```python
  from transformers import AutoModelForCausalLM, AutoTokenizer

  model = AutoModelForCausalLM.from_pretrained("Mr-FineTuner/Test_02_llama_trainPercen_myValidator_2ndTry")
  tokenizer = AutoTokenizer.from_pretrained("Mr-FineTuner/Test_02_llama_trainPercen_myValidator_2ndTry")

  # Example inference
  prompt = "<|user|>Generate a CEFR B1 level sentence.<|end|>"
  inputs = tokenizer(prompt, return_tensors="pt")
  outputs = model.generate(**inputs, max_length=50)
  print(tokenizer.decode(outputs[0], skip_special_tokens=True))
  ```

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