Four of the biggest companies in tech launched AI agents in September 2026, all within 18 days of each other. Meta's Muse came first on the 8th of September. Two days later Google taught Gemini to work across Gmail, Drive and Docs, and on the 24th of September Amazon gave its marketplace sellers an assistant that never clocks off. Microsoft finished the run on the 25th of September with Autopilot. An AI agent is an AI assistant that carries out tasks for you, working through your apps and accounts to get them done instead of only answering questions. The four are built for different people and do different jobs, but they are chasing the same prize.
Behind the launches sits more than $700 billion. That is what Microsoft, Alphabet, Amazon and Meta expect to spend in 2026 on capital projects, much of it on data centers and the chips inside them.
What each company launched
Muse is Meta's personal agent for ordinary users, while Gemini's new skills live inside Google Workspace for people that use AI for work. Amazon's agent watches its sellers' prices, stock and sales around the clock, and Autopilot runs in Teams and Outlook. The pitch underneath is the same. Meta says Muse "doesn't just answer questions, it actually does the work", and Microsoft calls Autopilot "a persistent, proactive and personal agent that keeps working even when you're not".
Anthropic was already selling this. Claude Cowork was on the market before any of the September launches, and when Microsoft released its own Copilot Cowork in June, it ran on Anthropic's models. On the 16th of September Anthropic folded Cowork and its chat into one Claude that takes "a report due at noon" and keeps going "even after you've closed your laptop".
Our Muse and Shopify piece covers Meta's partnership with Shopify and what Muse means for ecommerce and online stores.
Where the $700 billion goes
Amazon leads with about $220 billion in 2026, raised from $200 billion in July. Alphabet expects $195 billion to $205 billion, Microsoft about $175 billion, Meta $130 billion to $145 billion. Two thirds of Microsoft's spending went on chips, "short-lived assets, primarily CPUs and GPUs" in its own words.
Much of that capacity is rented out. Anthropic runs on Amazon's and Google's computers and has just signed an $11.6 billion deal with Akamai on top. The labs are now worth almost as much as the companies hosting them: OpenAI raised money at an $852 billion valuation in March, Anthropic at $965 billion in May.
Meta and Google were written off in AI
In 2025 Meta was the cautionary tale. Llama 4 landed to poor reviews and an admission that its benchmarks had been manipulated. In September 2026 Muse had more downloads in its first 12 days than ChatGPT managed at launch, and on the 21st of September Meta's shares closed up 11.43%, about $200 billion added in a single trading session.
Google had its own low in February 2023, when Alphabet fell more than 7% the day it showed off Bard. Gemini now reaches 58% of American AI users due to its 'AI Overviews', which are present where the majority of people search, two points behind ChatGPT.
Microsoft has left the personal assistant race
Copilot never caught on with the public, and Microsoft has stopped pretending otherwise. On the 25th of September Charles Lamanna, one of the Microsoft executives behind Copilot, told Bloomberg: "We're not going to build a Copilot that's like your personal companion." Autopilot lives inside Teams and Outlook. Microsoft is not even leading with its own AI. The Home tab of the new Copilot offers no Microsoft model, and Claude Opus 5.5 and GPT-6 Sol went in on the 22nd of September, the day both launched. We covered both launches in Claude Opus 5.5 and GPT-6 Sol: two frontier models in one night.
Why the companies keep spending
Andy Jassy, Amazon's chief executive, says even $220 billion will not buy the company enough capacity for 2026's demand. OpenAI was bringing in $2 billion a month by March, and Anthropic's run-rate passed $47 billion by May.
Meta's chief executive, Mark Zuckerberg, has said openly that he would rather overspend than risk falling behind. Wasting "a couple of hundred billion dollars" would be "very unfortunate obviously", he said in 2025, but spending too little is the bigger risk.
The case against the spending
The Bank for International Settlements, the bank for the world's central banks, has compared this boom with earlier ones in which a real breakthrough "attracted capital in excess of what commercial returns could ultimately justify". Meta's shares fell in July when its quarterly free cash flow came in at just $784 million.
Use has not caught up with the spending. 64% of US adults use AI, up from 61% a year earlier. Fewer than 7% of Microsoft's business seats have Copilot. The research firm Gartner expects more than 40% of agent projects to be cancelled by the end of 2027.
The spending has run ahead of any evidence that it will pay off. These companies are betting the return comes in the long run, as long as they can keep funding it until then, and in our opinion they may well be right. It's hard to imagine that businesses with this much talent and data haven't modelled the return long before signing the cheques, and they know how to keep investors patient in the meantime, through careful messaging and the way the financials are presented. Amazon has walked this road before. It didn't make a full-year profit until 2003, nine years after it was founded, when it finally earned $35 million, despite losing $149 million the year before.
Most of these agents will turn up inside software your business already pays for. If you want to talk about what that means for yours, book a free call.
Key takeaways
- Meta, Google, Amazon and Microsoft each launched an AI agent between the 8th and 25th of September 2026.
- Microsoft, Alphabet, Amazon and Meta expect more than $700 billion of capital spending in 2026, with Amazon's $220 billion carrying the largest share.
- Meta, written off after Llama 4, added about $200 billion to its market value in one day on Muse.
- 64% of US adults use AI, up three points in a year, and fewer than 7% of Microsoft's business seats have Copilot.
Frequently asked questions
What is an AI agent?
An AI agent is an AI assistant that carries out tasks for you, working through your apps and accounts to get them done instead of only answering questions.
How much are the biggest tech companies spending in 2026?
Microsoft, Alphabet, Amazon and Meta together expect more than $700 billion of capital spending in 2026, much of it on data centres and chips. Amazon's share is the largest, at about $220 billion.
Is the AI spending a bubble?
Nobody can say yet. The Bank for International Settlements, the bank for the world's central banks, has compared the AI boom with earlier booms in which capital ran ahead of returns. Amazon says that even at about $220 billion it will not have enough capacity to meet demand in 2026.