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hw1-hc3-detector
purabshingvi/hw1-hc3-detector
hw1-hc3-detector is a machine learning model from purabshingvi. Use it for the machine learning task on the model card, and read the license before you ship it in a product.
all-MiniLM-L6-v2 fine-tuned to classify answers as human-written (0) or ChatGPT-generated (1) on the HC3 dataset.
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At a glance
- Model type
- bert
- Access
- Public
- Created
- Sep 24, 2026
- Updated
- Oct 2, 2026
- SHA
- b051d916
Model card
From the Hugging Face model README
HW1 HC3 Detector
all-MiniLM-L6-v2 fine-tuned to classify answers as human-written (0) or ChatGPT-generated (1) on the HC3 dataset.
Results (HC3 test set, 4,668 answers)
| Model | Test accuracy |
|---|---|
| Baseline (frozen embeddings + logistic regression) | 0.8449 |
| Fine-tuned (this model, 5 epochs, lr 2e-5) | 0.9919 |
Training details
- Base model: sentence-transformers/all-MiniLM-L6-v2
- Optimizer: AdamW, learning rate 2e-5, 5 epochs, batch size 32, max length 256
- Labels: 0 = human, 1 = ChatGPT
Limitations
HC3 is a historical benchmark. This model is not a reliable detector for current AI-generated text.
- Type
- bert
- Created
- Sep 24, 2026
- Updated
- Oct 2, 2026