System output Against References and against the Input sentence (SARI) is an important evaluation metric for text summarization tasks in the field of natural language processing. SARI simultaneously measures the correctness of add, keep, and delete operations for simplified text, specifically assessing the quality of text simplification. It is typically reported as a percentage or a score between 0 and 1. This metric is widely used in relevant benchmarks and papers, effectively reflecting model performance in this dimension. Higher values are better.