RETA measures reward model reliability as the average oracle quality of the top η fraction of ranked responses, divided by the average response quality.
https://huggingface.co/OpenAssistant/ reward-model-deberta-v3-large-v2
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Establishing Reliability Metrics for Reward Models in Large Language Models
RETA measures reward model reliability as the average oracle quality of the top η fraction of ranked responses, divided by the average response quality.