Either

(a) someone's source is off by a whole ,000 and the Journal ran with it

(b) OpenAI is going to assume nation-state levels debt become the most valuable and powerful company since the Dutch East India Company,

or (c) OpenAI is talking to investors and governments around the world about public-private investments in fabs, electricity generation, attendant cities, infrastructure, etc. that might require a total investment over X years and all parties involved of $N trillion dollars.

Occam says (a), but (c) seems far more likely than (b).