reward

Train reward models with TRL RewardTrainer and LoRA for RLHF pipelines.

Updated Aug 27, 2026

Search Tags:#training #rlhf #grpo #loRA #reward-model #rloo #thinking-quality

Ready to run

npx skills add https://github.com/atrawog/overthink-plugins --skill reward-atrawog

💬 Prompt for ChatGPT / Claude Chat▼

Please help me install this Agent Skill.
Skill: reward
Source: https://github.com/atrawog/overthink-plugins/tree/main/overthink-jupyter/skills/reward
Command: npx skills add https://github.com/atrawog/overthink-plugins --skill reward-atrawog

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

Reward model development for RLHF pipelines—enabling scoring of responses to guide policy optimization.

Core Features & Use Cases

RewardTrainer and RewardConfig for training reward models with sequence classification heads.
Data preparation patterns for prompts, chosen/rejected pairs, and thinking-quality scoring.
Supports GRPO/RLOO workflows and LoRA-based fine-tuning with 4-bit or BF16 precision.

Quick Start

Provide a prompt and response dataset and run RewardTrainer to begin training a reward model for RLHF.

Frequently Asked Questions about reward

High-intent search queries and answers about installing and using this skill.

FAQPage Schema

How do I train a reward model for RLHF pipelines using chosen and rejected pairs?▼

To train a reward model for RLHF, provide a dataset formatted with prompts and chosen/rejected response pairs. The pipeline uses TRL RewardTrainer with a sequence classification head to score responses for policy optimization.

Can I use LoRA-based fine-tuning with 4-bit precision for reward model training?▼

Yes, LoRA-based fine-tuning supports 4-bit or BF16 precision for reward model training. This approach integrates with PEFT LoRA and TRL RewardConfig to efficiently adapt Transformer-based models for RLHF scoring.

What data format is required for thinking-quality scoring in reward models?▼

Thinking-quality scoring requires a dataset formatted as prompts alongside chosen and rejected response pairs. This data structure allows RewardTrainer to evaluate and score response quality during RLHF pipeline development.

Does this reward model training workflow support GRPO and RLOO policy optimization?▼

Yes, the reward model training workflow supports both GRPO and RLOO policy optimization. These algorithms use the trained sequence classification head to score and guide response generation during RLHF pipelines.

What dependencies do I need to run RewardTrainer for RLHF pipelines?▼

You need Transformer-based models, PEFT LoRA, and TRL RewardTrainer to build reward models for RLHF. These frameworks provide the sequence classification heads and fine-tuning capabilities required for response scoring.

Why do I need a reward model with a sequence classification head for RLHF?▼

A reward model with a sequence classification head is needed for RLHF to assign scalar scores to responses. These scores guide GRPO or RLOO policy optimization by ranking chosen versus rejected outputs during training.