Amazon‘s 14,000-plus layoffs announced last month touched almost every piece of the company’s sprawling business, from cloud computing and devices to advertising, retail and grocery stores. But one job category bore the brunt of cuts more than others: engineers.

Documents filed in New York, California, New Jersey and Amazon’s home state of Washington showed that nearly 40% of the more than 4,700 job cuts in those states were engineering roles. The data was reported by Amazon in Worker Adjustment and Retraining Notification, or WARN, filings to state agencies.

The figures represent a segment of the total layoffs announced in October. Not all data was immediately available because of differences in state WARN reporting requirements.

In announcing the steepest round of cuts in its 31-year history, Amazon joined a growing roster of tech companies that have slashed jobs this year even as cash piles have mounted and profits soared. In total, there have been almost 113,000 job cuts at 231 tech companies, according to Layoffs.fyi, continuing a trend that began in 2022 as businesses readjusted to life after the Covid pandemic.

Amazon CEO Andy Jassy has been on a multiyear mission to transform the company’s corporate culture into one that operates like what he calls “the world’s largest startup.” He’s looked to make Amazon leaner and less bureaucratic by urging staffers to do more with less and cutting organizational bloat.

Amazon is expected to carry out further job reductions in January, CNBC previously reported.

The company said it’s also shifting resources to invest more in artificial intelligence. The technology is already poised to reshape Amazon’s white-collar workforce, with Jassy predicting in June that its corporate head count will shrink in the coming years alongside efficiency gains from AI.

Human resources chief Beth Galetti, in her memo announcing the layoffs, focused on the importance of innovating, which the company will now have to do with fewer people, specifically engineers.

“This generation of AI is the most transformative technology we’ve seen since the Internet, and it’s enabling companies to innovate much faster than ever before,” Galetti wrote. “We’re convinced that we need to be organized more leanly, with fewer layers and more ownership, to move as quickly as possible for our customers and business.”

Amazon said in a statement that AI is not the driver behind the vast majority of the job cuts, and that the bigger goal was to reduce bureaucracy and emphasize speed.

Jassy said on Amazon’s earnings call last month that the cuts were in response to a “culture” issue inside the company, spurred in part by an extended hiring spree that left it with “a lot more layers” and slower decision-making.

The layoffs impacted a mix of software engineer levels, but SDE II roles, or mid-level employees, were disproportionately affected, the WARN filings show.

The AI boom is making software development jobs harder to come by as companies adopt coding assistants or so-called vibe coding platforms from vendors like Cursor, OpenAI and Cognition. Amazon has released its own competitor called Kiro.

As part of the broader belt-tightening, Amazon has sought in recent years to curtail investments in some of the company’s more experimental or unprofitable initiatives. It sunset a telehealth service, kids video calling device, fitness wearable and several brick-and-mortar retail chains.

Amazon’s video game division was targeted in the company’s latest layoff wave, California WARN filings show. Steve Boom, vice president of Audio, Twitch and Games, told staffers in a memo viewed by CNBC that “significant role reductions” would occur in its San Diego and Irvine, California, game studios, as well as within its central publishing team.

Game designers, artists and producers made up more than a quarter of the total cuts in Irvine, and they were roughly 11% of staffers laid off at Amazon’s San Diego offices, according to filings.

The company also told staffers it’s halting much of its work on big-budget, or triple A, game development, specifically around massively multiplayer online, or MMO, games, Boom wrote. Amazon has released MMOs including Crucible and New World. It was also developing an MMO based on “Lord of the Rings.”

Beyond its gaming division, Amazon also significantly cut back its visual search and shopping teams, according to multiple employee posts on LinkedIn. The unit is responsible for products like Amazon Lens and Lens Live, AI shopping tools that enable users to find products via their camera in real time or images saved to their device. The company rolled out Lens Live in September.

The team was primarily based in Palo Alto, California, and Amazon’s WARN filings indicate that software engineers, applied scientists and quality assurance engineers were heavily impacted across its offices there.

Amazon’s online ad business, one of its biggest profit centers, was downsized as well. More than 140 ad sales and marketing roles were eliminated across Amazon’s New York offices, accounting for about 20% of the roughly 760 positions cut, according to state documents viewed by CNBC.

WATCH: Box joining AWS marketplace in new partnership

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Here are five key things investors need to know to start the trading day:

Stock investors didn’t end up getting the post-Nvidia earnings market bounce they hoped for. After opening yesterday’s trading session higher, stocks took a dramatic midday tumble, once again casting doubt on the artificial intelligence trade.

Here’s what to know:

• Nvidia shares gave up their 5% post-earnings gain, ending the session down more than 3% despite the chipmaker’s blockbuster quarterly results and guidance. The AI darling’s stock is on track to finish the week down 5%.
• The Dow Jones Industrial Average swung more than 1,100 between its session highs and lows. All three major averages closed solidly in the red, with the tech-heavy Nasdaq Composite ending the day down 2.15%.
• Meanwhile, the CBOE Volatility Index — better known as Wall Street’s fear gauge — ended the session at a level not seen since April.
• Bitcoin fell to lows going back to April, further illustrating the shift away from risk assets.
• Before stocks’ midday reversal, Bridgewater founder Ray Dalio told CNBC that “we are in that territory of a bubble,” but that you don’t need to sell stocks because of it.
• The three major indexes are all on track to end the week in the red.
• Follow live markets updates here.

The belated September jobs report was finally released yesterday, and the headline number was much hotter than economists expected with an increase of 119,000 jobs. On the other hand, the unemployment rate ticked up to 4.4%, its highest level since 2021.

The chance of a rate cut at the Federal Reserve’s next meeting remained low after the report, according to the CME FedWatch Tool. But the odds flipped this morning after New York Fed President John Williams said he sees “room for a further adjustment” in interest rates, reviving hopes of a December cut.

Gap‘s “Milkshake” ad brought all the shoppers to the store. The retailer’s viral “Better in Denim” campaign with girl group Katseye helped drive comparable sales up 5% in its third quarter, beating analyst expectations.

The Old Navy and Banana Republic parent also surpassed Wall Street’s estimates on both the top and bottom lines, sending shares rising 4.5% in overnight trading. Athleta was the notable outlier, with the athleisure brand’s sales falling 11%.

Gap’s report comes at the end of a busy week for retail earnings. As CNBC’s Melissa Repko reports, one key theme of this quarter’s results has been that value-oriented retailers are winning favor with shoppers across income brackets.

The White House is putting together an executive order that would thwart states’ individual AI laws. A draft obtained by CNBC shows the order would focus on staging legal challenges and blocking federal funding for states to ensure their compliance.

The draft would work to the advantage of many AI industry leaders who have pushed back on a state-by-state approach to the technology’s regulation. A White House official told CNBC that any discussion around the draft is speculation until an official announcement.

Click here to read the full draft.

Joby Aviation is taking air taxi competitor Archer Aviation to court. In a lawsuit filed Wednesday, Joby accused Archer of using information stolen by a former employee to “one-up” a deal with a real estate developer.

Joby alleges that George Kivork, its former U.S. state and local policy lead, took files and information before jumping to the competitor in an act of “corporate espionage.” Archer called the case “baseless litigation” and said it’s “entirely without merit.”

Nvidia outperformed all expectations, reporting soaring profits Wednesday thanks to its graphics processing units that excel at AI workloads. But more categories of AI chips are gaining ground.

Custom ASICs, or application-specific integrated circuits, are now being designed by all the major hyperscalers, from Google‘s TPU to Amazon‘s Trainium and OpenAI’s plans with Broadcom. These chips are smaller, cheaper, accessible and could reduce these companies’ reliance on Nvidia GPUs. Daniel Newman of the Futurum Group told CNBC that he sees custom ASICs “growing even faster than the GPU market over the next few years.”

Besides GPUs and ASICs, there are also field-programmable gate arrays, which can be reconfigured with software after they’re made for use in all sorts of applications, like signal processing, networking and AI. There’s also an entire group of AI chips that power AI on devices rather than in the cloud. Qualcomm, Apple and others have championed those on-device AI chips.

CNBC talked to experts and insiders at the Big Tech companies to break down the crowded space and the various kinds of AI chips out there.

GPUs are the general-purpose workhorses of Nvidia and its top competitor, Advanced Micro Devices. Software is a major differentiator between the two GPU leaders. While Nvidia GPUs are tightly optimized around CUDA, Nvidia’s proprietary software platform, AMD GPUs use a largely open-source software ecosystem.

AMD and Nvidia sell their GPUs to cloud providers like Amazon, Microsoft, Google, Oracle and CoreWeave. Those companies then rent the GPUs to AI companies by the hour or minute. Anthropic’s $30 billion deal with Nvidia and Microsoft, for example, includes 1 gigawatt of compute capacity on Nvidia GPUs. AMD has also recently landed big commitments from OpenAI and Oracle.

Nvidia also sells directly to AI companies, like a recent deal to sell at least 4 million GPUs to OpenAI, and to foreign governments, including South Korea, Saudi Arabia and the U.K.

The chipmaker told CNBC that it charges around $3 million for one of its server racks with 72 Blackwell GPUs acting as one, and ships about 1,000 each week. 

Dion Harris, Nvidia’s senior director of AI infrastructure, told CNBC he couldn’t have imagined this much demand when he joined Nvidia over eight years ago.

“When we were talking to people about building a system that had eight GPUs, they thought that was overkill,” he said.

Nvidia’s GPUs are flexible enough for adoption by many AI companies, but they cost up to $40,000 and can be hard to get. Still, startups rely on GPUs because designing a custom ASIC has an even higher up-front cost, starting at tens of millions of dollars, according to Miller.

For the biggest cloud providers who can afford them, analysts say custom ASICs pay off in the long-run.

“They want to have a little bit more control over the workloads that they build,” Newsom said. “At the same time, they’re going to continue to work very closely with Nvidia, with AMD, because they also need the capacity. The demand is so insatiable.”

Google was the first Big Tech company to make a custom ASIC for AI acceleration, coining the term Tensor Processing Unit when its first ASIC came out in 2015. Google said it considered making a TPU as far back as 2006, but the situation became “urgent” in 2013 as it realized AI was going to double its number of data centers. In 2017, the TPU also contributed to Google’s invention of the Transformer, the architecture powering almost all modern AI.

A decade after its first TPU, Google released its seventh generation TPU in November. Anthropic announced it will train its LLM Claude on up to 1 million TPUs. Some people think TPUs are technically on par or superior to Nvidia’s GPUs, Miller said.

“Traditionally, Google has only used them for in-house purposes,” Miller said. “There’s a lot of speculation that in the longer run, Google might open up access to TPUs more broadly.”

Amazon Web Services was the next cloud provider to design its own AI chips, after acquiring Israeli chip startup Annapurna labs in 2015. AWS announced Inferentia in 2018, and it launched Trainium in 2022. AWS is expected to announce Trainium’s third generation as soon December.

Ron Diamant, Trainium’s head architect, told CNBC that Amazon’s ASIC has 30% to 40% better price performance compared to other hardware vendors in AWS.

“Over time, we’ve seen that Trainium chips can serve both inference and training workloads quite well,” Diamant said.

In October, CNBC went to Indiana for the first on-camera tour of Amazon’s biggest AI data center, where Anthropic is training its models on half a million Trainium2 chips. AWS fills its other data centers with Nvidia GPUs to meet the demand from AI customers like OpenAI.

Building ASICs isn’t easy. This is why companies turn to chip designers Broadcom and Marvell. They “provide the IP and the know-how and the networking” to help their clients build their ASICs, Miller said.

“So you’ve seen Broadcom in particular be one of the biggest beneficiaries of the AI boom,” Miller said.

Broadcom helped build Google’s TPUs and Meta‘s Training and Inference Accelerator launched in 2023, and has a new deal to help OpenAI build its own custom ASICs starting in 2026.

Microsoft is also getting into the ASIC game, telling CNBC that its in-house Maia 100 chips are currently deployed in its data centers in the eastern U.S. Others include Qualcomm with the A1200, Intel with its Gaudi AI accelerators and Tesla with its AI5 chip. There’s also a slew of start-ups going all in on custom AI chips, including Cerebras, which makes huge full-wafer AI chips, and Groq, with inference-focused language processing units.

In China, Huawei, ByteDance, and Alibaba are making custom ASICs, although export controls on the most advanced equipment and AI chips pose a challenge.

Edge AI with NPUs and FPGAs

The final big category of AI chips are those made to run on devices, rather than in the cloud. These chips are typically built into a device’s main System on a Chip, SoC. Edge AI chips, as they’re called, enable devices to have AI capabilities while helping them save battery life and space for other components.

“You’ll be able to do that right on your phone with very low latency, so you don’t have to have communication all the way back to a data center,” said Saif Khan, former White House AI and semiconductor policy advisor. “And you can preserve privacy of your data on your phone.”

Neural processing units are a major type of edge AI chip. Qualcomm, Intel and AMD are making NPUs that enable AI capabilities in personal computers.

Although Apple doesn’t use the term NPU, the in-house M-series chips inside its MacBooks include a dedicated neural engine. Apple also built neural accelerators into the latest iPhone A-series chips.

“It is efficient for us. It is responsive. We know that we are much more in control over the experience,” Tim Millet, Apple platform architecture vice president, told CNBC in an exclusive September interview. 

The latest Android phones also have NPUs built into their primary Qualcomm Snapdragon chips, and Samsung has its own NPU on its Galaxy phones, too. NPUs by companies like NXP and Nvidia power AI embedded in cars, robots, cameras, smart home devices and more.

“Most of the dollars are going towards the data center, but over time that’s going to change because we’ll have AI deployed in our phones and our cars and wearables, all sorts of other applications to a much greater degree than today,” Miller said.

Then there’s field-programmable gate arrays, or FPGAs, which can be reconfigured with software after they’re made. Although far more flexible than NPUs or ASICs, FPGAs have lower raw performance and lower energy efficiency for AI workloads.

AMD became the largest FPGA maker after acquiring Xilinx for $49 billion in 2022, with Intel in second thanks to its $16.7 billion purchase of Altera in 2015.

These players designing AI chips rely on a single company to manufacture them all: Taiwan Semiconductor Manufacturing Company.

TSMC has a giant new chip fabrication plant in Arizona, where Apple has committed to moving some chip production. In October, Nvidia CEO Jensen Huang said Blackwell GPUs were in “full production” in Arizona, too. 

Although the AI chip space is crowded, dethroning Nvidia won’t come easily.

“They have that position because they’ve earned it and they’ve spent the years building it,” Newman said. “They’ve won that developer ecosystem.”

Watch the video to see a breakdown of how all the AI chips work: https://www.cnbc.com/video/2025/11/21/nvidia-gpus-google-tpus-aws-trainium-comparing-the-top-ai-chips.html