Meta's established public market capitalization near $1.85 trillion, driven by robust revenue growth and AI product momentum such as the Muse agent, underpins the 93% trader consensus that it will hold a higher valuation than OpenAI on December 31. OpenAI's most recent confirmed post-money valuation stands at $852 billion from its March round, with ongoing talks for a potential $1.4 trillion pre-money financing serving mainly as bridge capital ahead of a 2027 IPO. Strong enterprise revenue momentum and annualized run rates approaching $70 billion support OpenAI's upward trajectory, yet the compressed three-month window limits the scope for a decisive valuation leap. A completed mega-round or major model breakthrough could narrow the gap, though execution risks and regulatory timelines constrain near-term upside.