Big-Five 2026 capex hits $600B (+36% YoY) — $450B routed to AI infrastructure, the largest single-year capital reallocation in tech history
Major cloud companies are expected to spend over $600 billion on capital expenditures in 2026 — a 36% increase from 2025 — with roughly $450 billion of that going to AI infrastructure. The figure is a tracking benchmark for whether the AI capex cycle is following the Nvidia-projected $1T cumulative-demand curve or running ahead of it. May 2026 evidence: ahead.
The $450B figure is consequential because it crosses the threshold where AI infrastructure becomes a larger annual capital flow than several entire sectors of the global economy. It exceeds the annual global spend on commercial aircraft, exceeds the global pharmaceutical R&D budget, and approaches the annual capital outlay of the global oil and gas exploration industry. AI infrastructure is no longer a tech-industry line item; it is one of the largest capital flows in the world.
The supply-side response is visible in two places. First, NVIDIA's $1T cumulative Blackwell + Rubin forecast through 2027 — doubled from prior — implies the demand curve runs through 2027 minimum without softening. Second, the May 2026 CPU supply crisis (six-month lead times, prices up 10%) is the first visible cascade where the AI buildout consumes general-purpose silicon capacity at scale. The capex isn't theoretical; it's already deformed adjacent markets.
Carbon Credits — AI Demand to Drive $600B From the Big Five for GPU and Data Center Boom by 2026 → · Clarifai — GPU Shortages: How the AI Compute Crunch Is Reshaping Infrastructure → · S&P Global — AMD's next-generation AI chips set to power 2026 data center growth →