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README.md

@@ -1,199 +1,144 @@
 ---
 library_name: transformers
-tags: []
+base_model: meta-llama/Meta-Llama-3.1-8B-Instruct
+datasets:
+- nvidia/HelpSteer2
+- NCSOFT/offsetbias
+- allenai/wildguardmix
+- argilla/magpie-ultra-v0.1
+- Magpie-Align/Magpie-Llama-3.1-Pro-DPO-100K-v0.1
+- Magpie-Align/Magpie-Pro-DPO-100K-v0.1
+- Magpie-Align/Magpie-Air-DPO-100K-v0.1
+pipeline_tag: text-classification
 ---
 
-# Model Card for Model ID
+<div align="center">
 
-<!-- Provide a quick summary of what the model is/does. -->
+<img src="misc/fig.jpg" width="400"/>
+  <div>&nbsp;</div>
+</div>
 
+# Skywork Reward Model Series
 
+## Introduction
 
-## Model Details
+[**Skywork-Reward-Gemma-2-27B**](https://huggingface.co/Skywork/Skywork-Reward-Gemma-2-27B) and [**Skywork-Reward-Llama-3.1-8B**](https://huggingface.co/Skywork/Skywork-Reward-Llama-3.1-8B) are two advanced reward models built on the [gemma-2-27b-it](https://huggingface.co/google/gemma-2-27b-it) and [Meta-Llama-3.1-8B-Instruct](https://huggingface.co/meta-llama/Meta-Llama-3.1-8B-Instruct) architectures, respectively. Both models were trained using the [Skywork Reward Data Collection](https://huggingface.co/collections/Skywork/skywork-reward-data-collection-66d7fda6a5098dc77035336d) containing only 80K high-quality preference pairs sourced from publicly available data.
 
-### Model Description
+We include only public data in an attempt to demonstrate that high-performance reward models can be achieved with a relatively small dataset and straightforward data curation techniques, without further algorithmic or architectural modifications. The sources of data used in the [Skywork Reward Data Collection](https://huggingface.co/collections/Skywork/skywork-reward-data-collection-66d7fda6a5098dc77035336d) are detailed in the [Data Mixture](#data-mixture) section below.
 
-<!-- Provide a longer summary of what this model is. -->
+The resulting reward models excel at handling preferences in complex scenarios, including challenging preference pairs, and span various domains such as mathematics, coding, and safety. As of September 2024, they hold the first and the third positions on the [RewardBench leaderboard](https://huggingface.co/spaces/allenai/reward-bench).
 
-This is the model card of a 🤗 transformers model that has been pushed on the Hub. This model card has been automatically generated.
+## Data Mixture
 
-- **Developed by:** [More Information Needed]
-- **Funded by [optional]:** [More Information Needed]
-- **Shared by [optional]:** [More Information Needed]
-- **Model type:** [More Information Needed]
-- **Language(s) (NLP):** [More Information Needed]
-- **License:** [More Information Needed]
-- **Finetuned from model [optional]:** [More Information Needed]
+Instead of relying on existing large preference datasets, we carefully curate the [Skywork Reward Data Collection](https://huggingface.co/collections/Skywork/skywork-reward-data-collection-66d7fda6a5098dc77035336d) (1) to include high-quality preference pairs and (2) to target specific capability and knowledge domains. The curated training dataset consists of approximately 80K samples, subsampled from multiple publicly available data sources, including
 
-### Model Sources [optional]
+1. [HelpSteer2](https://huggingface.co/datasets/nvidia/HelpSteer2)
+2. [OffsetBias](https://huggingface.co/datasets/NCSOFT/offsetbias)
+3. [WildGuard (adversarial)](https://huggingface.co/allenai/wildguard)
+4. Magpie DPO series: [Ultra](https://huggingface.co/datasets/argilla/magpie-ultra-v0.1), [Pro (Llama-3.1)](https://huggingface.co/datasets/Magpie-Align/Magpie-Llama-3.1-Pro-DPO-100K-v0.1), [Pro](https://huggingface.co/datasets/Magpie-Align/Magpie-Pro-DPO-100K-v0.1), [Air](https://huggingface.co/datasets/Magpie-Align/Magpie-Air-DPO-100K-v0.1).
 
-<!-- Provide the basic links for the model. -->
+**Disclaimer: We made no modifications to the original datasets listed above, other than subsampling the datasets to create the Skywork Reward Data Collection.**
 
-- **Repository:** [More Information Needed]
-- **Paper [optional]:** [More Information Needed]
-- **Demo [optional]:** [More Information Needed]
+During dataset curation, we adopt several tricks to achieve both performance improvement and a balance between each domain, without compromising the overall performance:
 
-## Uses
+1. We select top samples from math, code, and other categories in the combined Magpie dataset independently, based on the average ArmoRM score provided with the dataset. We subtract the ArmoRM average scores in the Magpie-Air subset and the Magpie-Pro subset by 0.1 and 0.05, respectively, to prioritize Magpie-Ultra and Magpie-Pro-Llama-3.1 samples.
+2. Instead of including all preference pairs in WildGuard, we first train a reward model (RM) on three other data sources. We then (1) use this RM to score the chosen and rejected responses for all samples in WildGuard and (2) select only samples where the chosen response's RM score is greater than the rejected response's RM score. We observe that this approach largely preserves the original performance of Chat, Char hard, and Reasoning while improving Safety. For both models, we use the 27B model to score the WildGuard samples.
 
-<!-- Address questions around how the model is intended to be used, including the foreseeable users of the model and those affected by the model. -->
+## RewardBench Leaderboard
 
-### Direct Use
+We evaluate our model on [RewardBench](https://huggingface.co/spaces/allenai/reward-bench) using the [official test script](https://github.com/allenai/reward-bench). As of September 2024, Skywork-Reward-Gemma-2-27B and Skywork-Reward-Llama-3.1-8B rank first and third on the RewardBench leaderboard.
 
-<!-- This section is for the model use without fine-tuning or plugging into a larger ecosystem/app. -->
+| Rank  | Model                       | Chat  | Chat Hard | Safety | Reasoning | Score |
+| :---: | --------------------------- | :---: | :-------: | :----: | :-------: | :---: |
+|   1   | Skywork-Reward-Gemma-2-27B  | 95.8  |   91.4    |  92.0  |   96.2    | 93.9  |
+|   2   | SFR-LLaMa-3.1-70B-Judge-r   | 96.9  |   84.8    |  92.2  |   97.6    | 92.8  |
+|   3   | Skywork-Reward-Llama-3.1-8B | 96.1  |   87.3    |  90.6  |   96.1    | 92.5  |
+|   4   | Nemotron-4-340B-Reward      | 95.8  |   87.1    |  92.2  |   93.6    | 92.2  |
+|   5   | ArmoRM-Llama3-8B-v0.1       | 96.9  |   76.8    |  92.2  |   97.3    | 90.8  |
+|   6   | internlm2-20b-reward        | 98.9  |   76.5    |  89.9  |   95.8    | 90.3  |
 
-[More Information Needed]
+## Demo Code
 
-### Downstream Use [optional]
+We provide example usage of the Skywork reward model series below. Please note that:
 
-<!-- This section is for the model use when fine-tuned for a task, or when plugged into a larger ecosystem/app -->
+1. We removed the BOS token from the chat templates of the two models to prevent it being added twice during `apply_chat_template` and tokenization.
+2. To enable optimal performance for the 27B reward model, ensure that you have enabled either the `flash_attention_2` or `eager` implementation. The default `spda` implementation may result in bugs that could significantly degrade the model's performance for this particular model.
 
-[More Information Needed]
+Below is an example of obtaining the reward scores of two conversations.
 
-### Out-of-Scope Use
+```python
+import torch
 
-<!-- This section addresses misuse, malicious use, and uses that the model will not work well for. -->
+from transformers import AutoModelForSequenceClassification, AutoTokenizer
 
-[More Information Needed]
+# Load model and tokenizer
+device = "cuda:0"
+model_name = "Skywork/Skywork-Reward-Gemma-2-27B"
+rm = AutoModelForSequenceClassification.from_pretrained(
+    model_name,
+    torch_dtype=torch.bfloat16,
+    device_map=device,
+    attn_implementation="flash_attention_2",
+    num_labels=1,
+)
+rm_tokenizer = AutoTokenizer.from_pretrained(model_name)
 
-## Bias, Risks, and Limitations
+prompt = "Jane has 12 apples. She gives 4 apples to her friend Mark, then buys 1 more apple, and finally splits all her apples equally among herself and her 2 siblings. How many apples does each person get?"
+response1 = "1. Jane starts with 12 apples and gives 4 to Mark. 12 - 4 = 8. Jane now has 8 apples.\n2. Jane buys 1 more apple. 8 + 1 = 9. Jane now has 9 apples.\n3. Jane splits the 9 apples equally among herself and her 2 siblings (3 people in total). 9 ÷ 3 = 3 apples each. Each person gets 3 apples."
+response2 = "1. Jane starts with 12 apples and gives 4 to Mark. 12 - 4 = 8. Jane now has 8 apples.\n2. Jane buys 1 more apple. 8 + 1 = 9. Jane now has 9 apples.\n3. Jane splits the 9 apples equally among her 2 siblings (2 people in total). 9 ÷ 2 = 4.5 apples each. Each person gets 4 apples."
 
-<!-- This section is meant to convey both technical and sociotechnical limitations. -->
+conv1 = [{"role": "user", "content": prompt}, {"role": "assistant", "content": response1}]
+conv2 = [{"role": "user", "content": prompt}, {"role": "assistant", "content": response2}]
 
-[More Information Needed]
+# Format and tokenize the conversations
+conv1_formatted = rm_tokenizer.apply_chat_template(conv1, tokenize=False)
+conv2_formatted = rm_tokenizer.apply_chat_template(conv2, tokenize=False)
+conv1_tokenized = rm_tokenizer(conv1_formatted, return_tensors="pt").to(device)
+conv2_tokenized = rm_tokenizer(conv2_formatted, return_tensors="pt").to(device)
 
-### Recommendations
+# Get the reward scores
+with torch.no_grad():
+    score1 = rm(**conv1_tokenized).logits[0][0].item()
+    score2 = rm(**conv2_tokenized).logits[0][0].item()
+print(f"Score for response 1: {score1}")
+print(f"Score for response 2: {score2}")
 
-<!-- This section is meant to convey recommendations with respect to the bias, risk, and technical limitations. -->
+# Output:
+# Score for response 1: 9.1875
+# Score for response 2: -17.875
+```
 
-Users (both direct and downstream) should be made aware of the risks, biases and limitations of the model. More information needed for further recommendations.
+## Declaration and License Agreement
 
-## How to Get Started with the Model
+### Declaration
 
-Use the code below to get started with the model.
+We hereby declare that the Skywork model should not be used for any activities that pose a threat to national or societal security or engage in unlawful actions. Additionally, we request users not to deploy the Skywork model for internet services without appropriate security reviews and records. We hope that all users will adhere to this principle to ensure that technological advancements occur in a regulated and lawful environment.
 
-[More Information Needed]
+We have done our utmost to ensure the compliance of the data used during the model's training process. However, despite our extensive efforts, due to the complexity of the model and data, there may still be unpredictable risks and issues. Therefore, if any problems arise as a result of using the Skywork open-source model, including but not limited to data security issues, public opinion risks, or any risks and problems arising from the model being misled, abused, disseminated, or improperly utilized, we will not assume any responsibility.
 
-## Training Details
+### License Agreement
 
-### Training Data
+The community usage of Skywork model requires [Skywork Community License](https://github.com/SkyworkAI/Skywork-Reward/blob/main/misc/Skywork%20Community%20License.pdf). The Skywork model supports commercial use. If you plan to use the Skywork model or its derivatives for commercial purposes, you must abide by terms and conditions within [Skywork Community License](https://github.com/SkyworkAI/Skywork-Reward/blob/main/misc/Skywork%20Community%20License.pdf).
 
-<!-- This should link to a Dataset Card, perhaps with a short stub of information on what the training data is all about as well as documentation related to data pre-processing or additional filtering. -->
+## Technical Report
 
-[More Information Needed]
+Coming soon. Please stay tuned.
 
-### Training Procedure
+## Contact
 
-<!-- This relates heavily to the Technical Specifications. Content here should link to that section when it is relevant to the training procedure. -->
+If you have any questions, please feel free to reach us at <[email protected]> or <liang.[email protected]>.
 
-#### Preprocessing [optional]
+## Citation
 
-[More Information Needed]
+If you find our work helpful, please feel free to cite us using the following BibTeX entry:
 
-
-#### Training Hyperparameters
-
-- **Training regime:** [More Information Needed] <!--fp32, fp16 mixed precision, bf16 mixed precision, bf16 non-mixed precision, fp16 non-mixed precision, fp8 mixed precision -->
-
-#### Speeds, Sizes, Times [optional]
-
-<!-- This section provides information about throughput, start/end time, checkpoint size if relevant, etc. -->
-
-[More Information Needed]
-
-## Evaluation
-
-<!-- This section describes the evaluation protocols and provides the results. -->
-
-### Testing Data, Factors & Metrics
-
-#### Testing Data
-
-<!-- This should link to a Dataset Card if possible. -->
-
-[More Information Needed]
-
-#### Factors
-
-<!-- These are the things the evaluation is disaggregating by, e.g., subpopulations or domains. -->
-
-[More Information Needed]
-
-#### Metrics
-
-<!-- These are the evaluation metrics being used, ideally with a description of why. -->
-
-[More Information Needed]
-
-### Results
-
-[More Information Needed]
-
-#### Summary
-
-
-
-## Model Examination [optional]
-
-<!-- Relevant interpretability work for the model goes here -->
-
-[More Information Needed]
-
-## Environmental Impact
-
-<!-- Total emissions (in grams of CO2eq) and additional considerations, such as electricity usage, go here. Edit the suggested text below accordingly -->
-
-Carbon emissions can be estimated using the [Machine Learning Impact calculator](https://mlco2.github.io/impact#compute) presented in [Lacoste et al. (2019)](https://arxiv.org/abs/1910.09700).
-
-- **Hardware Type:** [More Information Needed]
-- **Hours used:** [More Information Needed]
-- **Cloud Provider:** [More Information Needed]
-- **Compute Region:** [More Information Needed]
-- **Carbon Emitted:** [More Information Needed]
-
-## Technical Specifications [optional]
-
-### Model Architecture and Objective
-
-[More Information Needed]
-
-### Compute Infrastructure
-
-[More Information Needed]
-
-#### Hardware
-
-[More Information Needed]
-
-#### Software
-
-[More Information Needed]
-
-## Citation [optional]
-
-<!-- If there is a paper or blog post introducing the model, the APA and Bibtex information for that should go in this section. -->
-
-**BibTeX:**
-
-[More Information Needed]
-
-**APA:**
-
-[More Information Needed]
-
-## Glossary [optional]
-
-<!-- If relevant, include terms and calculations in this section that can help readers understand the model or model card. -->
-
-[More Information Needed]
-
-## More Information [optional]
-
-[More Information Needed]
-
-## Model Card Authors [optional]
-
-[More Information Needed]
-
-## Model Card Contact
-
-[More Information Needed]
+```bibtex
+@misc{skyworkreward2024,
+  title={Skywork Reward Model Series},
+  author={Liu, Chris Yuhao and Zeng, Liang},
+  year={2024},
+  month={September},
+  howpublished={\url{https://huggingface.co/Skywork}},
+  url={https://huggingface.co/Skywork},
+}
+```