Policy Learning in RLHF

Dual Role of the RLHF Reward Model: Ranking-based Training for Scoring Application

Relation between Verifiers and RLHF Reward Models

General Loss Minimization Objective for Reward Model Training

Architecture and Function of the RLHF Reward Model

Reward Model Training as a Ranking Problem in RLHF

Underdetermined Model

Limitations of Outcome-Based Rewards for Entire Sequences

Training a Reward Model with Preference Data

Converting Listwise Rankings to Pairwise Preferences for Reward Model Training

Diagnosing Undesired Model Behavior

An AI team is training a reward model using a dataset where, for each prompt, human annotators have ranked several generated responses from best to worst. What is the fundamental task the reward model is being trained to perform based on this specific type of data?

An AI development team is training a model to act as a helpful assistant. They create a dataset where, for each user prompt, human evaluators are shown two different generated responses and asked to choose which one is better. The model is then trained on this dataset of pairwise preferences. After training, the team observes that the model consistently assigns higher scores to longer, more detailed responses, even when they are less helpful or contain irrelevant information. Which of the following is the most likely explanation for this emergent behavior?

Ranking LLM Outputs as an Alternative to Rating

Regularization in RLHF Reward Model Training

Complexity of Reward Model Training in RLHF