YC’s OpenAI stake 💰, Gemini API Webhooks 🧑‍💻, AI PE partnerships 🏦

# What You Need to Know OpenAI's investor Y Combinator is selling off its stake in the company, signaling a shift in how early-stage investors are managing their bets on AI. Google added new notification features to its Gemini API that let developers get instant updates when something changes, making it easier to build AI-powered apps. Meanwhile, major private equity firms are teaming up with AI companies, showing that traditional finance is betting big on AI becoming a core business tool rather than just an experimental technology.