import torch
from transformers import AutoModelForCausalLM, AutoTokenizer, BitsAndBytesConfig
from peft import PeftModel
base_model_name = "TinyLlama/TinyLlama-1.1B-Chat-v1.0"
adapter_name = "zaid646/tinyllama-1.1b-alpaca-qlora"
tokenizer = AutoTokenizer.from_pretrained(base_model_name)
tokenizer.pad_token = tokenizer.eos_token
quant_config = BitsAndBytesConfig(
load_in_4bit=True,
bnb_4bit_compute_dtype=torch.bfloat16,
bnb_4bit_use_double_quant=True,
bnb_4bit_quant_type="nf4",
)
model = AutoModelForCausalLM.from_pretrained(
base_model_name,
quantization_config=quant_config,
device_map="auto",
torch_dtype=torch.bfloat16,
)
model = PeftModel.from_pretrained(model, adapter_name)
prompt = "### Instruction:\nExplain what machine learning is.\n### Response:\n"
inputs = tokenizer(prompt, return_tensors="pt").to(model.device)
outputs = model.generate(**inputs, max_new_tokens=256, temperature=0.7)
print(tokenizer.decode(outputs[0], skip_special_tokens=True))