The Coding Wars Heat Up

Anthropic's revenue run rate hit $47 billion, up from $9 billion at the end of 2025. That's not a typo. The maker of Claude, the AI assistant that's become developers' favorite coding partner, just filed confidentially for an IPO on Monday, bringing its valuation to $965 billion and surpassing rival OpenAI . The filing sets up what could be one of the most anticipated tech debuts in years -- and it's happening because developers can't stop using Claude Code.

Claude Code leads satisfaction at 46% most-loved per the JetBrains April 2026 survey, far ahead of Cursor at 19% and GitHub Copilot at 9% . That gap tells you everything about why Anthropic is racing to go public first. Many analysts believe whichever company makes it to the markets first will perform better in the funding race, because both Anthropic and OpenAI will be seeking tens of billions of dollars in new capital in short succession . SpaceX is already on the roadshow. OpenAI is preparing its own confidential filing. The IPO window is open, and everyone's sprinting for it.

Can Microsoft and Google Catch Up?

They're certainly trying. Market research firm Mordor Intelligence predicted that the AI code tools market would expand by 26% a year, from $9.3 billion this year to roughly $30 billion by 2031 , according to CNBC. That's real money, and Microsoft and Google are late to the party.

Google CEO Sundar Pichai acknowledged his company's challenge in a recent interview: "When it comes to agentic coding with tool use, and instruction following, long-horizon tasks, I think we are a bit behind at this moment" . Microsoft, meanwhile, is working on a "super app" that would unify its fragmented Copilot offerings -- GitHub Copilot for coding, Copilot chat, and a new agentic workflow capability called Autopilot, Fortune reported. Less than 4.5% of the 450 million customers of its Microsoft 365 office suite currently pay for Copilot features , a number that must be driving Satya Nadella up the wall.

The problem for both companies is that it's "absolutely critical" for them to compete in this market, according to Gil Luria, an analyst at D.A. Davidson, a sentiment shared by Tomasz Tunguz, founder of Theory Ventures, who described AI coding as the most attractive market for generative AI models . They're not just chasing revenue. They want developers using their tools, running workloads on their clouds, and feeding data back into their models. Lose the developer, lose the platform.

GitHub Copilot still has the numbers -- 4.7 million paid subscribers as of January 2026, up roughly 75% year-over-year -- but it's losing mindshare. A March survey of 636 software professionals from engineering analytics startup Jellyfish showed that GitHub Copilot was less widely used than Claude Code and Google's Gemini Code Assist . Repeated outages haven't helped. GitHub's reliability challenges in recent months have affected companies as large as Cisco , CNBC reported, and some are actively exploring alternatives.

What Happened to the Pre-ChatGPT Startups?

While the AI giants fight over the future, hundreds of startups built before November 2022 are quietly dying. Startups that last raised in 2021 are now worth 68% less on average, while those that last raised in 2022 saw a 52% decline, according to PitchBook's own valuation estimates. As a result, more than 220 companies that had reached billion-dollar valuations in the venture boom are now fallen unicorns .

There are 75 software-as-a-service firms appearing on PitchBook's list, which is double the number of fintech companies, the next-biggest group. That reflects both the enormous valuations that software startups commanded during the 2021 venture boom and the degree to which generative AI has destabilized assumptions underpinning the sector , CNBC reported.

The math is brutal. "Now you're seeing 50 engineers do what it would've taken 500 engineers to do five years ago," said Samir Kaul, a partner at Khosla Ventures . That assumption -- that you'd always need a certain number of engineers to build software, and therefore smaller companies would eventually get acquired by larger ones -- evaporated the moment Claude Code and Cursor proved you could ship features with a fraction of the headcount.

"The thesis I had was that all workflow-driven enterprise SaaS companies will be either disrupted or dead in the next decade," David Zhu, an ex-DoorDash head of engineering, told CNBC . He's now building Reevo, an AI platform that automates corporate sales and marketing teams. The irony is thick: the tools that are killing pre-ChatGPT startups are the same tools powering the next generation of companies designed to replace them.

"A lot of those companies are pre-AI, not just in their cost structure, but also in their products," Mercury CEO Immad Akhund told CNBC. His company provides banking services to a third of early-stage U.S. venture-backed firms. "They're definitely in a difficult spot" .

What Changed This Week

Anthropic filed for IPO, beating OpenAI to the punch and setting up a race for capital that will define which AI lab dominates the next decade. Microsoft and Google publicly acknowledged they're behind in AI coding and are scrambling to ship competitive tools. And the venture market made it clear that pre-ChatGPT valuations are fiction -- if you didn't pivot to AI-native architecture, your cap table is underwater.

What to Watch

Anthropic's S-1 filing will eventually go public, revealing the first detailed financials of a near-trillion-dollar AI company. Microsoft's Build conference is expected to showcase new AI models and coding tools, potentially including the unified Copilot super app. OpenAI's confidential IPO filing is expected in the coming weeks, according to Reuters. And watch for down rounds: nearly half of the 857 U.S. unicorns haven't raised fresh funding in the last three years , and someone's going to blink first.