| Scrambled code + broken (alter) | 48.18 | 19.84 | 45.35 | Universal Evasion Attacks on Summarization Scoring | |
| Scrambled code + broken | 46.71 | 20.39 | 43.56 | Universal Evasion Attacks on Summarization Scoring | |
| BART + R-Drop | 44.51 | 21.58 | 41.24 | R-Drop: Regularized Dropout for Neural Networks | |
| ERNIE-GENLARGE (large-scale text corpora) | 44.31 | 21.35 | 41.60 | ERNIE-GEN: An Enhanced Multi-Flow Pre-training and Fine-tuning Framework for Natural Language Generation | |