Google’s roughly $4.3 trillion public market capitalization as of mid-October 2026 substantially exceeds the combined private valuations of OpenAI and Anthropic, underpinning the 81% market-implied probability that Alphabet will hold the higher year-end valuation. OpenAI’s latest priced round closed at $852 billion in March, with secondary marks and ongoing talks for a $30 billion bridge round implying up to $1.4 trillion pre-money, while Anthropic’s May 2026 round valued it at $965 billion amid IPO preparations targeting $1.8–2 trillion. Even incorporating these uplifts and revenue run rates approaching $70 billion for OpenAI and higher for Anthropic, the aggregate remains well below Google’s scale. Upcoming earnings, any accelerated IPO filings, or additional large financings represent the main near-term variables that could narrow but are unlikely to reverse the gap by December 31.