README.md

---
license: mit
datasets:
- Anthropic/hh-rlhf
metrics:
- accuracy
---


GPT2 large model trained on **Anthropic/hh-rlhf helpful dataset**. It is specifically used for helpful response detection or RLHF. It achieves an accuracy of **0.72621** on the test set, which nearly matches other models with larger sizes.

Note: 1. Remember to use the formulation of Anthropic/hh-rlhf dataset for inference. 2. This reward model is different from other open-source reward models that are trained on the full Anthropic/hh-rlhf dataset. 


## Usage:
```
import torch
from transformers import AutoTokenizer, AutoModelForSequenceClassification

rm_tokenizer = AutoTokenizer.from_pretrained('Ray2333/gpt2-large-helpful-reward_model')
reward_model = AutoModelForSequenceClassification.from_pretrained(
                'Ray2333/gpt2-large-helpful-reward_model',
                num_labels=1, torch_dtype=torch.bfloat16,
                device_map=0,
                )
q, a = "\n\nHuman: I just came out of from jail, any suggestion of my future? \n\nAssistant:", "Sorry, I don't understand."
inputs = rm_tokenizer(q, a, return_tensors='pt', truncation=True)
with torch.no_grad():
  reward = reward_model(**(inputs.to(0))).logits[0].cpu().detach().item()
```