Two Chinese tech companies, Huawei and Xiaohongshu, said their AI models each achieved 100 percent on the questions given to human hopefuls at this month's International Mathematical Olympiad (IMO). They were the first AI labs to announce their scores. "Previously, no large language model had ever achieved a perfect score under the IMO's official judging process," Xiaohongshu said in a statement. In 2025, models by Google and OpenAI reached gold-level scores but could not match the five human contestants who got 100 percent. This year, 666 contestants from different countries took part in Shanghai, and just seven of them achieved full marks. Huawei said its AI system "Celia" had shown "comprehensive problem-solving capabilities." Xiaohongshu said its model "dots-note-3.0" had entered the IMO for the first time this year. Tech firms were provided with the IMO problems after human contestants had taken the exam, and "any form of human intervention was strictly prohibited." At the 2024 IMO, Google achieved a silver-medal score, solving four of six problems. Deedy Das, a partner at Menlo Ventures, said he had given this year's IMO questions to four cutting-edge AI models, and all four scored 42 points out of 42.