Code for the paper "Refined Direct Preference Optimization with Synthetic Data for Behavioral Alignment of LLMs", under review at ICLR 2024 Re-Align Workshop.

In this paper, we introduce refined Direct Preference Optimization (rDPO), a method for improving the behavioral alignment of Large Language Models (LLMs) without the need for human-annotated data. The method involves creating synthetic data using self-critique prompting by a teacher LLM and then utilising a generalized DPO loss function to distil to a student LLM. The loss function incorporates an additional external reward model to improve the quality of synthetic data, making rDPO robust to potential noise in the synthetic dataset. rDPO is shown to be effective in a diverse set of behavioural alignment tasks, such as improved safety, robustness against role-playing, and reduced sycophancy.

We use the Mixtral 8x7B model through the Together API at https://www.together.ai, so you will need an API token.

You can run the following notebook to generate synthetic data:

generate_data.ipynb

where generate_data.ipynb is located in each of the three experiment folders from the paper:

• safety: avoiding generating harmful responses.
• roleplay-robustness: robustness against role-playing injection in the user prompt.
• sycophancy: avoid being biased by the user when providing feedback.

Inside each generate_data.ipynb file, you will find the exact prompts for each experiment, in particular:

• The original prompt for each example.
• The critique prompt.
• The review prompt.

To score the previous synthetic data using the external reward model, just execute the following notebook configuring the paths inside:

reward_score.ipynb

Again, the notebook is located in each of the three experiment folders. It will add keys with the scores for each example in the dataset. Also, in those notebooks you can find the prompt template used to evaluate with the reward model.

Code will be uploaded soon!