On November 18, 2025, Alphabet — parent company of Google — released its newest artificial-intelligence model, Gemini 3, a leap forward in reasoning, multimodal capabilities and developer tools.

Yet the rollout came with an unusually stark warning from Alphabet’s CEO, Sundar Pichai, who acknowledged that the current surge of AI investment shows “elements of irrationality”.

He cautioned that, should the speculative fervour collapse, “no company is going to be immune, including us”.

Gemini 3 was broadly deployed across Google’s ecosystem — from the Gemini app and Search’s new “AI Mode,” to enterprise platforms and a newly unveiled agentic-coding environment called Google Antigravity.

According to Google, the model delivers a meaningful jump in performance over its predecessor, offering deeper contextual understanding, better reasoning, and expanded support for text, images, video, code and more.

The timing of the launch, and the tone of Pichai’s warnings, have triggered renewed debate over whether the dizzying rise in valuations, infrastructure build-out, and corporate spending in AI reflect lasting transformation — or are the makings of a speculative bubble.

Some analysts now flag Gemini 3’s success not only as validation of Google’s strategy, but also as a new “risk to watch” for other AI-linked stocks.

The tension is real: demand for GPU and AI-infrastructure remains strong, but mounting concerns over over-capacity, soaring energy needs, and the sustainability of inflated valuations cast a growing shadow.

As Pichai conceded, even firms at the top of the sector cannot assume immunity if tidewaters turn.

What unfolds next may reveal whether this convulsive expansion was foundation — or façade — for the next generation of technology.