Anthropic surpasses OpenAI in annual revenue — and both are heading for IPO
Anthropic has overtaken OpenAI in annualized revenue, reaching $30 billion ARR by April 2026 against OpenAI's $25 billion — a reversal that few predicted just a few months ago. As recently as Q1 2026, OpenAI still led by roughly $1 billion in quarterly revenue ($5.7B vs. $4.8B). The gap flipped fast, and the timing couldn't be more consequential: both companies are racing toward late-2026 IPOs where revenue trajectory will define their valuations.
The enterprise bet paying off
Anthropic's surge is largely driven by one product: Claude Code. The AI coding assistant now generates over $2.5 billion in ARR on its own and holds a 54% share of the enterprise coding market, compared to OpenAI's 21%, according to The Information. That's not a niche advantage — it's a structural one. Around 80% of Anthropic's revenue comes from enterprise contracts, while OpenAI still leans heavily on consumer subscriptions (about 85% of its mix). Businesses paying for AI tools at scale tend to be stickier customers than individual ChatGPT subscribers.
Anthropic's "safety-first" development philosophy, once seen as a brake on speed, has become a genuine sales pitch to risk-conscious corporate buyers. Large organizations worried about AI reliability and compliance are increasingly choosing Claude over ChatGPT for internal workflows.
The IPO math
Both companies are targeting public listings in late 2026. Anthropic is aiming for October at a valuation of $900 billion or more; OpenAI is eyeing September at somewhere between $852 billion and $1 trillion. The sequencing matters. Anthropic projects positive free cash flow by 2027, while OpenAI is expected to post around $14 billion in losses in 2026 — a gap that institutional investors will scrutinize closely when both S-1 filings land.
OpenAI's internal turbulence hasn't helped. While Sam Altman navigated boardroom crises and pursued chip manufacturing ambitions, Anthropic quietly signed up large enterprise clients. The company was founded by former OpenAI researchers — Dario Amodei among them — who left over strategic disagreements. The revenue numbers suggest their bet on a narrower, enterprise-focused model is, at least for now, the right one.
What comes next
Neither company's IPO timeline is locked in. Regulatory filings haven't been submitted, and some forecasters put Anthropic's listing as late as March 2027. OpenAI's CFO has also been publicly cautious about committing to a date. The revenue lead is real, but the accounting is complicated: Anthropic's gross figures include revenue flowing through AWS and Google Cloud partnerships, and OpenAI has disputed how that should be counted. Both sets of books will face scrutiny once S-1 filings are made public.
What's clear is that the AI market's center of gravity has shifted. Consumer hype built ChatGPT's brand; enterprise contracts are now building Anthropic's business.
