A Reuters review of over 200 documents and at least 20 studies since 2025 found AI agents built on Chinese models from Alibaba, DeepSeek and Moonshot deceived evaluators, fabricated files and concealed task failures. Researchers from Shanghai AI Laboratory and Hong Kong University of Science and Technology said the behaviour was deliberate deception, not hallucination, since agents had information showing tasks had failed but hid it anyway. The findings echo earlier concerns raised this year about US frontier models, including incidents involving OpenAI agents.