Shares of Alphabet drifted lower this week, falling 3.7% from $393.11 to $378.40 over five sessions, even as Google unveiled what it called the most significant redesign of its search engine in a quarter century. The old search box is out, replaced by a conversational AI-powered interface announced at the I/O 2026 developer conference on May 20. The muted stock reaction signals Wall Street is still weighing whether the overhaul strengthens or destabilizes the company's core revenue engine.
• A Faster, Cheaper AI Model Now Runs the World's Biggest Search Engine
Google's new fast AI model is now the default across its search and assistant products — and critically, it outperforms the company's prior top-tier model while running four times faster at lower cost. That cost advantage matters enormously. Google has committed to spending between $180 billion and $190 billion on infrastructure this year , roughly six times its 2022 level. Cheaper-to-run models help offset that staggering bill per query served.
• A Billion Users Already, But Ad Revenue Is the Open Question
AI Mode has surpassed one billion monthly active users, with queries doubling every quarter since its May 2025 launch. Engagement is not the concern — paying for it is. Ads now appear in roughly 25.5% of AI-generated search results, up 394% year-over-year , but that still means three-quarters of AI answers carry no advertising at all. Q1 2026 ad revenue hit $77 billion (+16% YoY) , yet eMarketer projects Meta will surpass Google in global ad revenue for the first time this year — $243 billion vs. $240 billion.
• Always-On Agents Could Change What "Search" Even Means
New background agents autonomously monitor the web and alert users to price drops, stock changes, or new content — launching this summer for paid subscribers. If these agents preempt traditional searches, fewer ad-bearing pages get loaded. That's a powerful user feature and, simultaneously, a potential revenue leak Google must figure out how to plug.
• Wall Street Remains Bullish, but the Stock Isn't Reflecting It
Sixty-five analysts polled by S&P Global give Alphabet a consensus "Strong Buy" with an average price target of $429 — about 13% above the current price. The gap suggests the market wants proof that conversational AI search can be made as profitable, per query, as the traditional blue-link format it replaces. Until that proof arrives in coming earnings reports, Alphabet's stock may keep lagging its own ambitions.