Alphabet Chief Executive Sundar Pichai has cautioned that no technology company is shielded from the shockwaves that could follow if the current surge in artificial intelligence investment unravels.
His comments, given in an interview with the BBC, add urgency to high global concerns that the sector is inflating beyond what current adoption and revenue models can support.
Pichai described today’s AI bubble as an “extraordinary moment”, and also pointed to what he called “elements of irrationality” in the market.
The concern is in line with earlier alarms sounded during the dotcom era, when valuations rose without clear foundations. Analysts now warn that a similar pattern is emerging in AI as venture capital builds startups and chipmakers at a pace that outstrips real-world usage.
He was explicit about the risks when asked how Alphabet would handle a severe downturn. “I think no company is going to be immune, including us,” he said.
Alphabet’s stock has jumped 46% this year, buoyed by optimism over its capacity to challenge OpenAI and Microsoft in advanced model development. However, the same rally has led to talks in the United States and the United Kingdom over whether markets are pricing in far more than the technology can reasonably deliver.
In Britain, policymakers have already noted that the sector may be drifting into bubble territory. Despite these warnings, Alphabet has doubled down on its UK footprint.
In September, the company committed £5 billion over two years to expand AI infrastructure, build a new data centre, and increase funding for DeepMind, its London-based research arm.
Pichai also confirmed that Google will begin training models in the UK, an important step for Prime Minister Keir Starmer, who wants the country to become the world’s third AI superpower after the US and China.
The company’s aggressive UK plans align with that goal, but they also point to a bigger dilemma. Pichai admitted that AI’s “immense” energy requirements are slowing Alphabet’s progress towards its net-zero targets, as the growing demand for high-performance computing drives up power consumption across its operations.
The admission shows an industry struggle on how to balance the speed of innovation, the AI bubble, with the environmental cost of the infrastructure required to support it.
Pichai’s warning lands as investors, regulators and governments are becoming more uneasy about the sustainability of AI valuations and the stress placed on energy grids.

