BIG TECH IS SPENDING $700 BILLION ON AI IN 2026 — AND NOBODY CAN SAY WHERE IT ENDS Microsoft, Google, Amazon, and Meta have committed a combined $700 billion to AI infrastructure this year alone, with no credible analysis predicting when or if the buildout will plateau. Fortune’s reporting finds executives across the industry unable to articulate a ceiling — raising serious questions about whether the returns will ever match the scale of the bet. Keywords: Big Tech AI spending 2026, AI infrastructure investment, hyperscaler AI capex, AI bubble