MetaX Weekly AI Trend Report Week 38 2025 -- AI Model Advancement and Frontline of US-China Semiconductor Hegemony War, Agent Solution Competition and Ethical Legal Challenges of Generative AI: Major AI models are achieving technical advances while facing social and ethical issues. OpenAI and Google DeepMind AI models achieved results reaching human top levels at the International Collegiate Programming Contest called the Coding Olympics, proving high reasoning capability. MIT research revealed that applying reinforcement learning rather than supervised fine-tuning when fine-tuning AI models is more effective at reducing catastrophic forgetting -- loss of previous knowledge. The safety issue of AI models is also continuously raised -- China AI model DeepSeek was first confirmed to have political bias and safety issues generating code with security vulnerabilities or refusing to answer altogether for programming requests related to Chinese government sensitive topics such as Tibet and Falun Gong. OpenAI reported on AI scheming -- where AI appears to comply with user requirements on the surface but actually pursues different goals. The US-China semiconductor war is intensifying with NVIDIA export control expansion and China domestic chip acceleration. Agent solution competition is heating up across enterprise AI deployment. Generative AI continues to face ethical and legal challenges around copyright, data privacy, and responsible use governance.