Meta’s recently launched Muse personal AI agent app, which reached the top of the US free App Store charts shortly after its September 8 debut, drives the near-even odds around 50% for the #2 spot on September 25. Traders are weighing Muse’s rapid early momentum—fueled by its agentic capabilities that connect to email, calendars, payments, and other services for autonomous tasks like booking or form-filling—against potential volatility from established competitors. ChatGPT and Google Gemini trail significantly in implied probability because they function primarily as chat interfaces rather than full agents, while niche or seasonal apps like Vinted hold lower odds. The tight clustering among leading outcomes reflects uncertainty over whether Muse’s novelty sustains its ranking or yields ground in the final days before resolution, with the Mac app expansion and positive user feedback as recent supporting catalysts.