STAR-GRPO: Canonical Anchoring and Reliability-First Advantages against Representation-Dependent Reward Hacking

arXiv:2609.36900 · cs.AI · Submitted 2026-09-29 · Read on arXiv

cs.AI

Submitted: 2026-09-29

Updated: 2026-09-29

Terminology

• GRPO — 1× in this paper · explained in 6 episodes
• Reward Hacking — 1× in this paper · explained in 8 episodes

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