Summary

Zitron uses newly disclosed Microsoft earnings data — confirmed by Bloomberg analysis — to show that OpenAI alone accounted for roughly $24.1 billion, or ~70%, of Microsoft's FY26 AI revenues. That single client relationship also represents more than 7% of Microsoft's entire $331.8 billion in FY26 revenue. He contextualizes this against Microsoft's $270 billion in capital expenditures since 2022, arguing the spend has effectively propped up one unsustainable hyperscaler rather than generating diversified AI revenue. The post frames this as damning evidence that Microsoft's AI strategy has produced no meaningful broader growth after four years. Zitron concludes the AI bubble narrative is no longer deniable.

Key Insight

Microsoft's $270B capex since 2022 has produced not a diversified AI business but a single-client dependency: OpenAI now accounts for ~70% of its AI revenue, exposing the AI boom as a financial house of cards built around one unsustainable company.

Spicy Quotes (click to share)

• 7

  it's impossible to ignore that Microsoft has spent $270 billion in capital expenditures to prop up a single client

• 4

  its overall AI plays have failed to create any significant revenue growth or opportunities

• 8

  We are now four years into the AI bubble, and Microsoft has little to show for it other than one very large and very unsustainable company that requires near-infinite resources to keep paying its cloud compute bills.

• 6

  analyst estimates have OpenAI and Anthropic making up over 70% of all AI revenues across Microsoft, Google and Amazon

• 4

  OpenAI's spend and revenue share accounted for 7% of Microsoft's $331.8 billion in FY26 revenue

Tone

critical, investigative, alarmed