Mira Murati's AI dream team got their stock options. Now many are out. Thinking Machines Lab CEO Mira Murati and Meta CEO Mark Zuckerberg. Getty Images Thinking Machines Lab has lost a third of its founding team to rivals amid fierce AI talent wars. Meta, OpenAI, and xAI lured the founders of Thinking Machines Lab with huge compensation offers. CEO Mira Murati's startup has also hired top talent and recently unveiled a new type of AI model. Thinking Machines Lab has raised billions in capital while assembling one of AI's most elite technical teams. Now it's watching some of that talent walk out the door. As Big Tech rivals dangle eye-popping pay packages and early employees unlock their first slice of equity, the buzzy, 1-year-old startup has become ground zero for tech's escalating talent wars. Nearly a third of its 42-person founding team — 13 people — have left since its launch, a Business Insider review of LinkedIn profiles and conversations with four sources found.…