Model Card: llm-course-hw3-tinyllama-qlora

This model was fine-tuned as part of Homework 3 in the HSE LLM Course.
It applies QLoRA to a chat-based TinyLlama model for sentiment classification.

The model predicts a sentiment label (negative, neutral, or positive) by generating a short text response conditioned on the input, formatted using the model’s chat template.

Model Sources

• Base model: https://huggingface.co/TinyLlama/TinyLlama-1.1B-Chat-v1.0
• Dataset: https://huggingface.co/datasets/cardiffnlp/tweet_eval

Training Method

Training follows a supervised fine-tuning setup in a conversational format.

Each training example is converted into a dialogue of the form:

{"role": "system", "content": "<instruction>"},
{"role": "user", "content": "Text: <input text>"},
{"role": "assistant", "content": "<sentiment label>"}

Training Hyperparameters

• Base model: TinyLlama/TinyLlama-1.1B-Chat-v1.0

• PEFT method: QLoRA (LoRA + 4-bit quantization)

• Quantization: NF4, 4-bit

• Compute dtype: FP16

• LoRA rank: 8

• LoRA alpha: 16

• LoRA dropout: 0.05

• Target modules: attention projections (q_proj, k_proj, v_proj, o_proj)

• Batch size (per device): 16

• Gradient accumulation steps: 2

• Learning rate: 2e-4

• Optimizer: paged_adamw_8bit

• LR scheduler: cosine

• Epochs: 1

Results

• Macro F1 (test set): ~0.54