Good morning. Here is what mattered in AI today. Jensen Huang has resigned as Nvidia’s chief executive after 33 years, and chief financial officer Colette Kress is leading the company while the board searches for a successor. Google released Gemini 4 Hydrogen, a faster and cheaper model that now powers Search, and a breach at the inference provider Fireworks AI exposed Notion AI chat transcripts. A Microsoft 365 outage that began on Thursday is still disrupting Outlook, Teams and Copilot, along with the Microsoft connectors for Claude and ChatGPT. We also explain the LLMjacking trade behind that breach, look at how LessWrong and the Alignment Forum work and pick a paper that adapts models by deleting weights.