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Gradient-Guided Reward Optimization

techniqueactiveprovisionalgradient-guided-reward-optimization-9c2867b9·1 events·first seen 8d ago

Aliases: Gradient-Guided Reward Optimization

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5arXiv · cs.CL·8d ago·source ↗

GGRO: Gradient-Guided Reward Optimization for inference-time LLM alignment

Researchers introduce Gradient-Guided Reward Optimization (GGRO), an inference-time alignment method that uses gradient signals from a reward model to inject 'nudging tokens' at high-uncertainty decoding steps, rather than relying on sampling-intensive re-ranking approaches like Best-of-N. The method monitors token-level entropy to detect distribution drift and steers generation trajectories directly, claiming improved robustness to reward hacking with minimal computational overhead. Experiments show gains across safety, helpfulness, and reasoning benchmarks compared to standard inference-time alignment baselines.