GitHub Copilot has 4.7 million paid subscribers. Cursor hit $2 billion in annual recurring revenue in under two years -- the fastest B2B SaaS ramp on record. Claude Code didn't exist a year ago; now 46% of senior developers prefer it to Microsoft's incumbent, according to JetBrains.
The AI coding assistant market is no longer about autocomplete. It's about who controls the terminal, the IDE, and the cloud environments where software gets built. And this week, the two biggest bets on that future collided: Anthropic confidentially filed its IPO prospectus with the SEC on Monday, setting up a potentially historic share sale , while Microsoft opened Build 2026 in San Francisco with what sources described as a "super app" strategy to unify its fractured Copilot offerings.
Can Microsoft Catch Up Before Anthropic Goes Public?
The AI code tools market is projected to expand by 26% annually, from $9.3 billion this year to roughly $30 billion by 2031, according to market research firm Mordor Intelligence . But the real prize isn't revenue -- it's lock-in. Google and Microsoft want developers using their tools, running workloads on their clouds, and relying on their models so the models themselves get bigger and smarter in the process , D.A. Davidson analyst Gil Luria told CNBC.
Microsoft is gearing up for coding-related announcements at Build this week, CNBC reported, following Google's emphasis on new products at I/O in May. The timing matters. Anthropic has zoomed ahead of the field, largely thanks to Claude Code, its AI coding assistant . At Snowflake, CEO Sridhar Ramaswamy said it's not uncommon for a "phenomenally productive engineer" to spend $50,000 a year on Claude Code, according to CNBC.
GitHub Copilot's share among professional developers fell from 67% to 51% in the Stack Overflow Developer Survey published in late December 2025, while Cursor debuted at 18% adoption and Claude Code reached 10% on its first appearance . More striking: the JetBrains Developer Ecosystem Survey 2026 showed Copilot at 29%, Cursor at 18%, and Claude Code at 18% -- three numbers close enough to signal the end of Microsoft's monopoly.
The Pragmatic Engineer survey in early 2026 found that Claude Code is the most loved tool at 46%, far ahead of Cursor on 19% and GitHub Copilot at 9% . Senior leaders are especially enthusiastic about Claude Code, the survey noted. Yet GitHub Copilot usage increases with company size, overtaking Claude Code at the largest companies -- a testament to Microsoft's enterprise sales machine and its ability to bundle Copilot into existing contracts.
What Does a Trillion-Dollar Coding IPO Look Like?
Anthropic announced in May that its revenue run rate has ballooned to $47 billion, up from $10 billion in annual revenue last year, and last week closed a funding round at a $965 billion valuation, topping OpenAI's $852 billion valuation from late March . If Anthropic debuts above $1 trillion, it would immediately catapult into the ranks of the most highly valued companies in the world and likely mark the second- or third-largest IPO ever, behind SpaceX and Saudi Aramco , NBC News reported.
Many analysts believe whichever company makes it to the markets first -- Anthropic or OpenAI -- will perform better in the funding race, because both will be seeking tens of billions of dollars in new capital in short succession . Wedbush analyst Dan Ives called it "an opening of the floodgates for the IPO market, which has been relatively dormant for a few years."
The IPO filing comes as Anthropic's growth in the private sector accelerates. Claude jumped to the No. 1 slot on Apple's chart of top U.S. free apps in late February , following a conflict with the Department of Defense that saw defense contractors drop Anthropic to comply with a DOD order. The company is still suing the Trump administration to reverse its blacklisting, though President Trump told CNBC in April that a deal is "possible."
Anthropic's infrastructure spending reflects its ambitions. The company struck an agreement with rival SpaceX last month to use available compute at its Colossus 1 data center in Memphis, Tennessee, paying SpaceX $1.25 billion per month through May 2029 , according to SpaceX's prospectus.
