Meta's new AI model, Muse Spark, has been introduced as the company's most significant launch in years, with shares rising by over 9% following the announcement. The first AI model from Meta’s superintelligence lab, which will power its AI app and be integrated into Instagram, WhatsApp, Facebook and its AI Ray-Bans, is designed to streamline tasks like shopping and trip planning. The launch signals a strategy to challenge rivals OpenAI and Google in the AI game. The company's CEO, Mark Zuckerberg, did not provide specific details about the return on AI investments during a January earnings call and expressed satisfaction with rebuilding its AI effort. The timing is crucial as Meta faces competition from OpenAI, Google and Apple in the coming months.