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Personalized Reward Modeling on Chatbot Arena Personalized

75.92AccuracyP-GenRM
50.928857.416963.90570.3931Jan 6, 2026Jan 12, 2026Jan 18, 2026Jan 24, 2026Jan 30, 2026Feb 5, 2026Feb 12, 2026

Evaluation results

MethodLinks
P-GenRMBase Model=Llama 3.1 8B, Scaling=Ind-16, Pro-82026.0275.92
P-GenRMBase Model=Llama 3.1 8B, Scaling=Ind-8, Pro-42026.0274.3
P-GenRMBase Model=Llama 3.1 70B, Scaling=None2026.0273.42
P-GenRMBase Model=Llama 3.1 8B, Scaling=None2026.0272.68
FT RM + SynthesizeMeBase Model=Llama 3.1 70B2026.0272.05
Bradley-Terry Finetuned Reward ModelBase Model=Llama 3.1 70B2026.0271.12
FT RM + SynthesizeMeBase Model=Llama 3.1 8B2026.0269.78
Bradley-Terry Finetuned Reward ModelBase Model=Llama 3.1 8B2026.0267.21
Persona-guided Scoring InductionBase Model=Llama 3.1 70B2026.0265.55
In-Context LLM (+ SynthesizeMe)Base Model=Llama 3.1 70B2026.0263.14
Persona-guided Scoring InductionBase Model=Llama 3.1 8B2026.0262.2
P-CHECKBackbone=Llama3-8b, Evaluation Protocol=In context LLM-as-a-Judge2026.0161.56
In-Context LLM (+ SynthesizeMe)Base Model=Llama 3.1 8B2026.0261.07
PALBase Model=Llama 3.1 70B2026.0259.4
VPLBase Model=Llama 3.1 70B2026.0259.02
SynthMe JudgeBackbone=Llama3-8b, Evaluation Protocol=In context LLM-as-a-Judge2026.0158.83
In-Context LLM (+ Preference History)Base Model=Llama 3.1 70B2026.0258.65
In-Context LLM (+ Preference History)Base Model=Llama 3.1 8B2026.0258.53
GPOBase Model=Llama 3.1 70B2026.0258.5
Memory JudgeBackbone=Llama3-8b, Evaluation Protocol=In context LLM-as-a-Judge2026.0158.15
VPLBase Model=Llama 3.1 8B2026.0258.12
GPOBase Model=Llama 3.1 8B2026.0257.87
In-Context LLM (+ CoT)Base Model=Llama 3.1 70B2026.0257.61
PALBase Model=Llama 3.1 8B2026.0257.31
In-Context LLM (+ CoT)Base Model=Llama 3.1 8B2026.0257.05
In-Context LLM (Default)Base Model=Llama 3.1 70B2026.0257.02
BT + SynthMeBackbone=Llama3-8b, Evaluation Protocol=Finetuned Reward Model2026.0156.42
In-Context LLM (Default)Base Model=Llama 3.1 8B2026.0256.37
CoT distill JudgeBackbone=Llama3-8b, Evaluation Protocol=In context LLM-as-a-Judge2026.0155.84
P-CHECKBackbone=Llama3-3b, Evaluation Protocol=In context LLM-as-a-Judge2026.0155.03
PALBackbone=Llama3-8b, Evaluation Protocol=Finetuned Reward Model2026.0153.89
CoT distill JudgeBackbone=Llama3-3b, Evaluation Protocol=In context LLM-as-a-Judge2026.0153.77
Default JudgeBackbone=Llama3-8b, Evaluation Protocol=In context LLM-as-a-Judge2026.0153.56
VPLBackbone=Llama3-8b, Evaluation Protocol=Finetuned Reward Model2026.0153.36
BT + SynthMeBackbone=Llama3-3b, Evaluation Protocol=Finetuned Reward Model2026.0153.32
SynthMe JudgeBackbone=Llama3-3b, Evaluation Protocol=In context LLM-as-a-Judge2026.0152.76
PALBackbone=Llama3-3b, Evaluation Protocol=Finetuned Reward Model2026.0152.41
VPLBackbone=Llama3-3b, Evaluation Protocol=Finetuned Reward Model2026.0152.34
Memory JudgeBackbone=Llama3-3b, Evaluation Protocol=In context LLM-as-a-Judge2026.0152.29
Default JudgeBackbone=Llama3-3b, Evaluation Protocol=In context LLM-as-a-Judge2026.0152.23
GPOBackbone=Llama3-8b, Evaluation Protocol=Finetuned Reward Model2026.0152.01
GPOBackbone=Llama3-3b, Evaluation Protocol=Finetuned Reward Model2026.0151.89