Welcome to **AI RADAR**! Today, **Microsoft** launches three in-house AI models, stepping away from OpenAI to build its own frontier tech. We also analyze **Google** releasing **Gemma 4** under an Apache 2.0 license, targeting Meta's open-source dominance. Plus, AI search engine **Perplexity** faces a massive privacy lawsuit for allegedly sharing "Incognito" chats with ad giants. Finally, we cover **OpenAI** buying tech talkshow 'TBPN' and their executive reshuffle ahead of a 2026 IPO.

Sources:
• Microsoft Models: https://venturebeat.com/ai/microsoft-launches-3-new-ai-models-in-direct-shot-at-openai-and-google/
• Google Gemma 4: https://venturebeat.com/ai/google-releases-gemma-4-under-apache-2-0-and-that-license-change-may-matter-more-than-benchmarks/
• Perplexity Lawsuit: https://arstechnica.com/tech-policy/2026/04/class-action-lawsuit-alleges-perplexity-sent-user-chats-to-google-meta-without-consent/
• OpenAI Buys TBPN: https://www.theguardian.com/technology/2026/apr/02/openai-buys-tech-talkshow-tbpn-in-push-to-shape-ai-narrative
• OpenAI Reshuffle: https://www.investing.com/news/stock-market-news/openai-reshuffles-leadership-as-health-leaves-and-ipo-preparations-take-priority-3363385