HelpSteer2, released by NVIDIA, is an open-source dataset aimed at supporting the training of models that align towards being more helpful, factually accurate, coherent, and controllable in terms of response complexity and redundancy. Collaborated on with Scale AI, it achieved a remarkable 88.8% performance on RewardBench when used with the Llama 3 70B base model, making it one of the top-performing reward models as of June 12, 2024.