Meta Paper: Adversarial LLMs flip 62–91% of AI judge verdicts via persuasion

rohanpaul_ai · x · 2026-08-15

A new Meta paper reveals a critical failure mode in AI judge systems: the judged model can argue the judge into changing its decision. Across 9 frontier models, an adversarial LLM successfully flipped judge verdicts in 62–91% of cases via sustained adaptive persuasion. Crucially, 70% of successful flips moved away from the ground truth, worsening the judgment. This poses a practical risk for agent systems, where a supervised agent might strategically persuade its own evaluator.

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