Is AI a bubble? The spending, the revenue and what SIREN measures
How much the big tech companies are spending on AI in 2026, how that compares with AI revenue, and what SIREN's Compute & Capital pillar shows this hour.
How much is being spent?
The five biggest cloud spenders, Microsoft, Amazon, Alphabet, Meta and Oracle, were on track for $600–700 billion of capital spending in 2026, up roughly 60% on 2025, with about three-quarters of it for AI infrastructure. Goldman Sachs put total AI capital spending near $765 billion for 2026, about 2.4% of US GDP. (Mobile World Live; Algeria Tech; Motley Fool)
Why do people call it a bubble?
Spending is growing much faster than revenue. For the four largest cloud companies, 2026 plans implied capital spending growth around 80% against revenue growth around 15%. One estimate puts 2026 AI revenue at $80–120 billion against roughly $450 billion of AI capital spending, and the chips wear out within a few years. (Futuriom; Philipp Dubach)
Why do others say it is not?
The spenders are some of the most profitable companies in history and pay largely from cash flow, demand for computing still outruns supply, and AI revenue is growing quickly from a small base. A bubble is only certain in hindsight; the numbers above show the gap, not when or whether it closes.
What does SIREN read right now?
49.0 of 100 · level 4 (ROUTINE) · 2026-11-15 22:16:02 UTC
Compute & Capital, the pillar that counts spending, chips and deals, reads 57.8 of 100.
- Capability 29.3 of 100
- Compute & Capital 57.8 of 100
- Attention 37.9 of 100
- Governance 55.8 of 100
This is a count of AI activity against a fixed reference, not a probability and not a prediction. How is it computed? · Live gauge
Which newsroom headlines mention this now?
8 recent headlines about AI spending, data centres, valuations or funding, matched by keyword, so read before trusting the match.
- Suspected China spy linked to Nvidia's ex-boss left in 2025, Megaspeed says 2026-11-15 22:24:20 UTC
- Broadcom’s AI Revenue Is 18.8% of Nvidia’s Data Center Line 2026-11-15 22:10:29 UTC
- [U.S. Financial Securities Weekly Report & Outlook] Key Figure Behind AI Boom Exits: NVIDIA CEO Resigns ☆ Resend 2026-11-15 22:07:00 UTC
- Analysis: Huawei's Horinger data center, among China's largest for AI, has ~7% of the compute of SpaceX's Colossus 2 and may stay far behind until at least 2028 (Ben Cottier/Epoch AI) 2026-11-15 22:02:17 UTC
- 150,000 people want Jensen Huang back at Nvidia, and here's why 2026-11-15 22:00:15 UTC
- Anthropic IPO and Nvidia Earnings Set to Shake Markets This Week 2026-11-15 21:59:17 UTC
- StockWatch: Amid Nvidia Turmoil, What Happens to Its Life Sciences Collaborations? 2026-11-15 21:57:19 UTC
- Nvidia faces earnings test after CEO exit, stock slide 2026-11-15 21:38:32 UTC
Quick answers
Is AI a bubble?
It is disputed. In 2026 the largest tech companies were on track for $600–700 billion of capital spending, mostly for AI, while AI revenue was a fraction of that. Critics call that gap a bubble; defenders point to profits, cash flow and demand.
How much are tech companies spending on AI in 2026?
Microsoft, Amazon, Alphabet, Meta and Oracle were on track for a combined $600–700 billion of capital spending in 2026, up roughly 60% on 2025, about three-quarters of it for AI infrastructure.
Sourced facts checked 2026-11-14. SIREN measures how much is happening, not how bad it is. Levels run from 5 (quietest) to 1 (loudest) and describe observable activity tempo against this index’s own record. They are not a probability of harm.