The money pouring into the AI build-out, set against a century of humanity's largest bets — measured as a share of the economy that had to pay for each one.
~1.9% of US GDP, 2025
~$3T poured in since ChatGPT
No income yet in sight to cover it
Peak annual spend · share of US GDP
One year of AI capex outweighs a century of moonshots
0.5%1.0%1.5%2.0%
AI data-center capex 2025
~1.9% of GDP
The Kobeissi Letter, 2025 · stricter 5-company tally ≈ 1.3%
Nationwide broadband early 2000s
1.2% of GDP
Apollo program 1961–72
0.6% of GDP
Interstate Highway System 1956–70s
0.6% of GDP
Rural electrification 1949
0.6% of GDP
Manhattan Project 1942–45
0.4% of GDP
Off the chart
The one bet on record that was bigger: the 1880s railroad build, around 6% of GDP — but of an economy a small fraction of today's size. It's the honest ceiling, and the last time capital rushed this far ahead of the returns. Kedrosky
The value of that money, in today's terms
Apollo cost $309 billion in today's money. At the 2026 pace, the AI build-out spends one entire Apollo program every eleven weeks.
The roughly $3 trillion poured in since ChatGPT launched is about ten Apollo programs, compressed into three years.
Every bet on this chart paid for something we still use — the highways, the grid, the moon landing. This is the first one where the income to cover it isn't yet in sight.