Google's TPU chips are selling, but the bill for building them hit Alphabet's stock

Start with the hardware. Google’s seventh-generation TPU, called Ironwood, shipped in November 2025, a decade after the company built its first custom AI chip in 2015. A TPU is a tensor processing unit, a chip designed for one job, the matrix math behind AI models, and it competes with Nvidia’s more general-purpose graphics processors. Alphabet only started selling TPUs to outside customers in the second quarter. ¹

The customers are showing up. Google Cloud revenue more than doubled in the third quarter to roughly $30.7 billion, and its profit margin widened to 36.2 percent, which eased a worry that margins had already peaked. ² The cloud backlog, meaning contracted demand not yet delivered, reached about $560 billion, and management expects a little over half of it to be recognized over the next 24 months. ¹

Here is the catch. Think of a machine shop that has to buy and install the lathes before it can bill a single customer for finished parts. That is Google’s position. CFO Anat Ashkenazi put it this way: cash goes out while the company builds up inventory, and it comes in once it starts delivering and billing for TPU systems. ¹

The outflow is large. Capital spending was $51.4 billion in the quarter, against $24 billion a year earlier. ² Free cash flow, the cash left after paying for equipment and upkeep, was negative $9.06 billion, up from negative $5.8 billion in the second quarter. ³ Alphabet held its 2026 spending forecast at $195 billion to $205 billion and is targeting more than $300 billion in 2027. ³ That 2027 figure is a target, not a result, and the company says more capex detail comes next quarter. ²

Investors sold hard. Shares fell about 12 to 13 percent, the steepest one-day drop on record by CNBC’s count. ¹ Earnings per share were $2.12 against a $3.02 consensus, though part of that gap traces to an $8.7 billion paper loss on equity investments. ³² Search is the other sore spot: revenue grew 12 percent to about $63 billion, below estimates for a second straight quarter, and Google says AI Mode queries earn less per query than classic web search. ³¹

The risk is that cloud growth leans on demand that may not last. Many AI startups rent Google’s compute, and much of what they pay with is venture money, so a funding dry spell would hit cloud revenue too. ³ One analyst framed it as a “how do we pay for it” problem rather than a “nobody wants it” problem. ²

Our read: The silicon looks like it is working. Ironwood is selling, the backlog is huge and cloud margins are healthy. What spooked the market is the gap between buying the machines and collecting the rent. Watch two numbers next: how fast backlog turns into billed revenue, and whether free cash flow stops sinking once TPU deliveries ramp.

On the bench: if you rent AI compute, TPUs now sit beside Nvidia GPUs as a choice, so price out both for your workload rather than assuming one. Ask any provider what it will charge over a full contract term, and keep an eye on whether demand for these chips holds up, because the spending plans behind them are enormous.

Footnotes

1. CNBC, “Alphabet earnings miss first sign AI is taking a bite out of search”. Retrieved October 30, 2026. ↩ ↩² ↩³ ↩⁴ ↩⁵

2. Fortune, “Alphabet’s Google Cloud revenue doubles to $31 billion as cash flow stays deep red”. Retrieved October 30, 2026. ↩ ↩² ↩³ ↩⁴ ↩⁵

3. arstechnica.com, “Alphabet Shares Plunge as Google Cloud Grows but Cash Flow Turns Negative”. Retrieved October 30, 2026. ↩ ↩² ↩³ ↩⁴ ↩⁵