Amazon's $220 billion AI bet hits a snag: Trainium 2 chips are only 20 months old and already being replaced

Godwin Oluponmile

Fri, August 7, 2026 at 7:35 PM GMT+3 5 min read

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In February, Andy Jassy told investors that Amazon would spend about $200 billion on capital projects in 2026. By the July 30th earnings call, the figure was $220 billion against the $161.4 billion the whole business produced over the previous year

Jassy used part of that call to walk analysts through why the spending works, and he did it by splitting the investment in two: there are the data centers, and there are the servers and networking equipment inside them. He said the two run on different capital cycles. The buildings carry "30 plus year useful lives." Across that stretch, Amazon should get "at least five to six generations of server economics," each one cheaper than the last because the building is already paid for.

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Then he put a number on the servers, saying they "currently have a useful life of at least five to six years." He added that Amazon Web Services (AWS) has a track record of "finding ways to extend the useful life of this equipment."

Amazon cut its server life estimate to 5 years in January 2025

After finishing a useful life study in the fourth quarter of 2024, Amazon cut a subset of its servers and networking equipment from six years to five, effective January 2025. At the same time it decided to retire certain servers and networking equipment early. The company gave the SEC one reason: "an increased pace of technology development, particularly in the area of artificial intelligence and machine learning."

Those decisions carried a price. Roughly $700 million off 2025 operating income from the useful life change, about $920 million in accelerated depreciation and related charges for the early retirements and another $600 million of that expected to land during 2025.

Depreciation is the mechanism underneath all of this — the way a company spreads equipment cost across the years it expects to use it. Stretch the assumption and current profits look better. Shorten it and the bill comes sooner.

Amazon has done both, repeatedly. Servers went from three years to four in 2020, four to five in 2022, and five to six in January 2024, before the 2025 reversal.

Trainium 2 chips are only about 20 months old

Internal planning documents from Amazon's Indiana campus, reported August 6th by Business Insider, describe a server cycle already turning over. Amazon is stitching separate buildings there into a single machine it calls an "AGI SuperCluster" internally. Buildings folded in become "annexes" sharing core networking equipment with a neighbor instead of running their own. Some facilities on the campus, which the documents don't identify as the annexes, are planning to put Trainium 3 servers in place of Trainium 2 systems.

Trainium 2 reached general availability in December 2024. The oldest units anywhere are about 20 months old.

Run that against Jassy's own math and the gap opens up. If a break-even takes just under three years, and the free cash flow arrives in the two to three years after that, the economics need something close to the full five or six years of service. Hardware pulled at 20 months hasn't reached break-even, let alone paid its way.

How Amazon answers the depreciation question

Hardware leaving a building is not the same as hardware being retired. A Trainium 2 redeployed to inference work elsewhere in Amazon keeps depreciating on schedule with nothing written off, and most of the Trainium 2 capacity Anthropic uses already runs inference, Semafor reported. Business Insider's reporting also says the new work leaves Project Rainier's servers alone, and no date is attached to the Indiana swap. A spokesperson told Business Insider the company is "always designing, upgrading, and improving our data center infrastructure."

Where to check the server estimate in Amazon's next annual report

Amazon's cash flow statement shows it has spent $66.1 billion more on property and equipment over the 12 months ending June 30 than a year earlier — money it attributes to AI. Free cash flow across that stretch was an outflow of $7.6 billion. Depreciation and amortization ran $75.2 billion against $58.6 billion, though that line covers content costs and lease assets alongside equipment.

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Amazon has commented on the Indiana redesign but has not said whether five years still reflects how long it expects to run Trainium 2 there. When the next annual report lands, the capex number will lead the coverage.

The one that answers the question sits in the property and equipment footnote, on the line giving the estimated useful life of servers and networking equipment. Jassy says AWS keeps finding ways to make that number longer, but the filings show it going the other way.