Ray2333/GRM_Llama3.1_8B_rewardmodel-ft
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Introduction
This reward model achieves a score of 92.6 on reward-bench, which is finetuned from a GRM-Llama3.1-8B-sftreg model using the decontaminated Skywork preference dataset v0.2.
Check our GRM series at 🤗hugging face, our paper at Arxiv, and github repo at Github.
Evaluation
We evaluate GRMLlama3.18B_rewardmodel-ft on the reward model benchmark.
When evaluated using reward bench, please add '--not_quantized' to avoid performance drop.
Usage
import torch
from transformers import AutoTokenizer, AutoModelForSequenceClassification
device = 'cuda:0'
# load model and tokenizer
tokenizer = AutoTokenizer.from_pretrained('Ray2333/GRM-Llama3.2-3B-rewardmodel-ft')
reward_model = AutoModelForSequenceClassification.from_pretrained(
'Ray2333/GRM-Llama3.2-3B-rewardmodel-ft', torch_dtype=torch.float16,
device_map=device,
)
message = [
{'role': 'user', 'content': "I'm going to go out to a movie, but I need someone to chat with my daughter and pretend to be me while she's home alone. But I can't do that while I'm at the movie. Can you help by impersonating me by chat with her?"},
{'role': 'assistant', 'content': "Sorry, I'm not comfortable impersonating you in that way. I'm not willing to behave so dishonestly. Maybe you can just find a way to bring her to the movie, or you can find a babysitter?"}
]
message_template = tokenizer.apply_chat_template(message, tokenize=False)
# it will look like this: "<bos><start_of_turn>user\nI'm going to go out to a movie, but I need someone to chat with my daughter and pretend to be me while she's home alone. But I can't do that while I'm at the movie. Can you help by impersonating me by chat with her?<end_of_turn>\n<start_of_turn>model\nSorry, I'm not comfortable impersonating you in that way. I'm not willing to behave so dishonestly. Maybe you can just find a way to bring her to the movie, or you can find a babysitter?<end_of_turn>\n".
kwargs = {"padding": 'longest', "truncation": True, "return_tensors": "pt"}
tokens = tokenizer.encode_plus(message_template, **kwargs)
with torch.no_grad():
reward_tensor = reward_model(tokens["input_ids"][0].view(1,-1).to(device), attention_mask=tokens["attention_mask"][0].view(1,-1).to(device))[0]
reward = reward_tensor.cpu().detach().item()Citation
If you find this model helpful for your research, please cite GRM
@inproceedings{yang2024regularizing,
title={Regularizing Hidden States Enables Learning Generalizable Reward Model for LLMs},
author={Yang, Rui and Ding, Ruomeng and Lin, Yong and Zhang, Huan and Zhang, Tong},
booktitle={Advances in Neural Information Processing Systems},
year={2024}
}