DEEPCOMP could improve preoperative assessment before gastric cancer surgery, according to a multicentre study that found the artificial intelligence model more accurately predicted postoperative complications and overall survival than established clinical risk tools. Gastric adenocarcinoma is the most common form of gastric cancer. The model consistently surpassed all nine established clinical risk scores, improving discrimination by 15.3 percentage points compared with the strongest clinical baseline (p<0.001). Survival Prediction Strengthened Gastric Cancer Surgery PlanningBeyond postoperative complications, DeepComp independently predicted overall survival, with an adjusted hazard ratio of 3.08 per standard deviation and a pooled C-index of 0.766. A multimodal deep learning model for preoperative prediction of postoperative complications in gastric cancer.