Alphabet's Gemini Market Share Tops 21%, Driving Siri Integration

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Alphabet's Gemini AI market share soared from 5% to over 21% in 2025, leading Apple to integrate Gemini into Siri. Google Search accounted for $56.6B of Q3 revenue, and analysts forecast 14% revenue growth with a 30x forward P/E for 2026, implying mid-teens upside.

1. Vinod Khosla Raises Alarm Over Proposed Billionaire Tax’s Impact on California’s Economy

Veteran venture capitalist Vinod Khosla issued a stark warning that Representative Ro Khanna’s proposal to impose an additional income tax on billionaires could trigger an exodus of high-net-worth individuals from California, eroding the state’s revenue base permanently. Khosla highlighted that the top 1% of earners currently contribute nearly 50% of California’s personal income tax receipts, and that even a modest shift of 5% of this cohort to lower-tax jurisdictions could translate into a multi-billion-dollar annual shortfall. He cautioned that lost capital and entrepreneurial talent may not return, threatening the state’s ability to fund critical programs and maintain its competitive position in technology, research and higher education.

2. Gemini’s Rapid Market Share Gain Threatens OpenAI’s Dominance

Alphabet’s generative AI model, Gemini, vaulted from a 5% share of web-based chatbot interactions in January 2025 to 18% by year-end, according to analytics firm Similarweb, while OpenAI’s ChatGPT share dipped from 87% to 68%. More recent data suggests Gemini may now command over 21%, driven largely by the launch of Gemini 3 in November and its selection as the default AI assistant for Apple’s Siri. This shift could disrupt planned spending of more than $200 billion on AI infrastructure, as investors and corporate backers reallocate resources toward Google’s ecosystem and away from a potentially overvalued OpenAI ahead of its anticipated public offering.

3. Analysts Forecast Alphabet’s Share Price to Climb Double Digits by End of 2026

Wall Street consensus projects Alphabet’s earnings per share to reach $12.76 in fiscal 2027, implying that at a 30x forward-earnings multiple—consistent with its current valuation—the stock could trade near $383 by December 2026, roughly 14% above recent levels. This outlook is underpinned by expectations for 14% revenue growth in 2026, driven by continued strength in Google Search (which generated $56.6 billion of $102.3 billion total revenue in Q3 2025), accelerating adoption of Gemini-powered cloud services, and resilience in digital advertising despite macroeconomic headwinds.

Sources

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