The US federal budget in 2024 had outlays of 6.8 trillion dollars [1].

nVidia's current market cap (nearly all AI investment) is currently 4.4 trillion dollars [2][3].

While that's hardly an exact or exhaustive accounting of AI spending, I believe it does demonstrate that AI investment is clearly in the same order of magnitude as government spending, and it wouldn't surprise me if it's actually surpassed government spending for a full year, let alone half of one.

1. https://www.cbo.gov/publication/61181

2. https://www.google.com/finance/quote/NVDA:NASDAQ

3. https://www.cnbc.com/2025/09/30/nvidias-market-cap-tops-4poi...

> NVIDIA's total annual revenue for its fiscal year 2025 (ended January 26, 2025) was $130.5 billion

It is clearly not in the same order of magnitude