ResearchBenchmarksModel Fingerprinting on Llama-2-7B ppo-v0.1-rewardModel Fingerprinting on Llama-2-7B ppo-v0.1-rewardFollow100Similarity ScorePCS59.980870.370480.7691.1496Apr 7, 2026Evaluation resultsMethodMethodLinksSimilarity ScorePCSMethod Category=Parame...Method Category=Parameter-based2026.04100ProFlingoMethod Category=Text-l...Method Category=Text-level2026.04100AttnDiff2026.04100ICSMethod Category=Parame...Method Category=Parameter-based2026.0499.99LogitsMethod Category=Output...Method Category=Output-level2026.0498.84LLMMap2026.0478.36REEFMethod Category=Repres...Method Category=Representation-level2026.0461.52