“But the most absurd and preposterous of all, and which shewed, more completely than any other, the utter madness of the people, was one started by an unknown adventurer, entitled”A company for carrying on an undertaking of great advantage, but nobody to know what it is.”” Charles Mackay, Memoirs of Extraordinary Popular Delusions and the Madness of Crowds (1841)
Your cousin texts you a chart. Your CFO wants the AI line item frozen “until the market settles.” Somewhere in the same week a startup with $0 revenue and a $2B round quietly dies, and the comment section files the autopsy: see, LLMs don’t work. Meanwhile the boring ticket agent you built is still closing tickets at 4am and has no opinion whatsoever about Nvidia’s stock price. One of those two things is about to get switched off. The wrong one, usually, by someone reasonable, for reasons that sound great in the meeting.
Bottom line: This is a money bubble. Not a “the tech is fake” bubble. The fundraising, the capex dick-measuring, the circular vendor deals, the GPU churches in the desert: that pops. People will stop lighting dumb money on fire. They will stop raising obscene amounts for a wrapper and a deck. The models, the agents, the adoption curve? Those do not go back in the box.
If you cannot hold both of those in your head at once you will make the two classic dumb trades: either you treat every press release as destiny, or you treat a valuation crash as proof the whole thing was a carnival trick.
Say the word in a room and you get four different movies:
When people talk about this AI bubble they are almost never talking about (1). They are talking about (2) and (3) with a little (4) in the round-tripped cloud credits.
Technical reality: transformers work. Tool-using agents work well enough to replace whole categories of grunt work if you design them like this book says. Context windows got huge. That is not a hallucination of the market. That is 2022-2026 on disk.
Financial reality: the price of the story got stupid. Capex at the five biggest US clouds/AI infra names was being quoted in the mid-to-high hundreds of billions for 2026. Model-lab revenue (even the ones printing real bills) is a rounding error next to the iron they’re burning. Valuations assumed every knowledge worker becomes a seat, forever, at list price, with no DeepSeek in the room and no open weights eating the middle. Fundraising assumed “AI” on the slide was a business model. It is a feature. Sometimes it is a cost center.
A bubble is when the money believes a story faster than the cash flows can catch it. That is this. It is not when the compiler stops working.
Every general-purpose tech does this:
Dot-com: Pets.com is a punchline. Amazon is a country. The fiber they overbuilt is why your house has a pipe. 2000 was a financial event. TCP/IP did not get repealed. The GeoCities under-construction GIF died. The construction did not.
This one will rhyme. The labs that only exist as a story will get merged, acquihired, or quietly wound down. The hyperscalers will write down a data center or three and call it “optimization.” Headcount in “AI strategy” will get a new job title or no job. Tokens will not get dumber. Agents will not forget how to use tools. Your customers will not go back to doing the thing by hand because a Series B exploded.
Call this one a composite, because that is what it is. I have lived pieces of it and watched the rest from a folding chair. Nobody handed me an audited spreadsheet on the way out.
You run a company that actually ships. 2024-2026 you got pitched twice a week: “we’ll put an agent on it.” Half those pitches were a chatbot with a logo, and I said yes to one of them because the demo was pretty and I was tired. You still built the boring version: tools, a loop, a stop condition, logs a human can read. My memory of every version of this I have touched is the same: the boring one quietly ate hours nobody was tracking. I cannot tell you how many hours mine saved, because I never wrote a single number down. Not one. Two exits, and I ran my own agents on vibes. That is its own species of dumb, and I am about to spend a whole book telling you to track the thing I did not track. It also showed up on a slide as “AI transformation” so finance would stop asking.
Put illustrative numbers on it, because the shape only argues if you can run the math. Say 900 tickets a week, every one touched by a human. Stand up the boring agent and it closes 300 end to end, leaves 600 for people, and kicks anything it is unsure about to a queue a human reads. Those are scenario inputs I made up so you can follow the arithmetic, not a measurement I took. The threshold matters more than the volume: if the agent is not clearing a fifth of intake, or humans reopen more than one closure in twenty, you shut it off. Write that threshold down before you turn it on, or you will argue about it later with a market chart in your hand.
Then the tape gets ugly.
If you freeze experiments that never had a customer, good. That was tourist money. If you freeze the agent that closes tickets, you just decided the bubble was technical. It isn’t. The ticket agent does not care what OpenAI is worth this week. It cares whether the tool call succeeded.
Same split inside the industry:
| Dies in a pop | Survives a pop |
|---|---|
| $100M seed for a thin wrapper | A workflow with a measurable stop |
| Training runs as brand marketing | Inference that a customer pays for |
| Circular cloud credits booked as ARR | Cash from a human who needed a job done |
| “Foundation model” on the pitch, no moat | Owns the workflow data the wrapper rents |
| Headcount that exists to have AI | Headcount that uses AI to ship |
You want to be in the right column before the music stops. Not because you’re a moralist. Because the right column still has customers when the left column is a Substack post.
The loud failure is obvious: you believed the deck and bought the GPU church.
The quiet failure is worse and it will be more common:
You treat a financial pop as a technical verdict and you stop.
That’s how companies missed the web after 2001. The magazine said it was over. The survivors just had cheaper servers and less competition. The people who “knew it was a bubble” and sat on their hands got a story they tell at parties. The people who knew it was a bubble and kept building the real thing got the decade. I was in the first group in 2001, posting first-post-grade certainty on Slashdot about how it was all over, and I have the party story to prove it, which is worth exactly what a party story is worth.
Second quiet failure: you keep spending like it’s 2025 after the permission is gone. Same stupidity, opposite direction. When capital gets scarce you do not get extra points for a 70B fine-tune you cannot name a customer for. You get a board meeting. I have sat in that one holding a 70B fine-tune and a customer list of zero, explaining “strategic capability” to people who wanted a number.
Do
Don’t
Ch. 1 is the history and the next leap (including the quantum brochure, minus the brochure). Ch. 2 is why the money around that history got drunk. Ch. 3 is what an agent actually is, the part that survives the hangover.
If you came here for a hot take that “AI is over”: wrong book. If you came here for permission to light money on fire because the demo slapped: also wrong book.
The tape will pop. The tech will not. Build like you believe the second sentence.
Thesis is Jeremy’s (financial bubble, not technical): that stays as argument, not citation. Everything checkable gets anchored or flagged:
https://www.sec.gov/Archives/edgar/data/789019/000119312526323660/msft-20260630.htm),
read 9 September 2026. It states total funding commitments of $13.0
billion related to the OpenAI investment, of which $11.9 billion had
been funded as of 30 June 2026; an equity-method stake of about 25% on
an as-converted basis; and fiscal 2026 revenue from commercial
arrangements with OpenAI, inclusive of revenue-sharing payments, of
$24.1 billion, with $6.0 billion of accounts receivable from OpenAI at
year end. Microsoft does not break that $13.0 billion into cash
versus Azure compute credits anywhere in the filing, and its
own announcement (Official Microsoft Blog, 23 January 2023,
https://blogs.microsoft.com/blog/2023/01/23/microsoftandopenaiextendpartnership/)
says only “multiyear, multibillion dollar investment” and names no
figure. So the split is Jeremy’s read, not a disclosed fact. The point
survives: the number everyone quotes is a commitment, not cash, and the
same vendor booked $24.1 billion back from the company it funded. Other
vendor-to-lab commitments got announced the same way, in blog posts with
no figure attached, so this is the one I can put a filing behind and the
only one I will.