Big Tech’s massive spending on artificial intelligence is set to continue unchecked in 2025 after Amazon topped its rivals with a planned $100bn-plus investment in infrastructure this year.

Spending by the four leading US tech companies had already surged 63 per cent to historic levels last year. Now executives are vowing to accelerate their AI investments, dismissing concerns about the vast sums being bet on the nascent technology.

Microsoft, Alphabet, Amazon and Meta have reported combined capital expenditure of $246bn in 2024, up from $151bn in 2023. They forecast spending could exceed $320bn this year as they compete to build data centres and fill them with clusters of specialised chips to remain at the forefront of AI large language model research.