W42 Weekly: OpenAI-Broadcom strike 10GW custom chip deal, Claude 4.5 Haiku achieves frontier performance at 1/3 cost, TSMC Q3 profits surge 39%, Wikipedia traffic falls 8% due to AI search, Google DeepMind enters fusion energy, Walmart-OpenAI revolutionize e-commerce, EU issues first AI Act fine, AI infrastructure investment enters trillion-dollar era

Week 41 in AI: OpenAI DevDay unveils GPT-5 Pro & Sora 2, AMD-OpenAI forge $6B chip partnership, SoftBank acquires ABB Robotics for $5.4B entering Physical AI era, global AI infrastructure race intensifies with $193B investments, 54% of US jobs face AI transformation.