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OpenAI Files to Go Public, Joining Anthropic in the Biggest AI IPO Race Ever

OpenAI Files to Go Public, Joining Anthropic in the Biggest AI IPO Race Ever

OpenAI confirmed on June 8, 2026 that it confidentially filed for a U.S. IPO, following rival Anthropic to Wall Street. Here is why both frontier labs are rushing public now, what their filings reveal about AI economics, and what investors and builders should watch next.

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OpenAI Files to Go Public, Joining Anthropic in the Biggest AI IPO Race Ever

OpenAI is officially going public. On June 8, 2026, the company behind ChatGPT announced that it had confidentially filed a draft registration statement — a Form S-1 — with the U.S. Securities and Exchange Commission. The news landed just one week after its closest rival, Anthropic, filed its own confidential IPO paperwork. Two of the world's most valuable private AI companies are now racing toward the public markets at the same time, in what may become the defining liquidity event of the generative-AI boom.

The symbolic weight is hard to overstate. Until now, the frontier-AI industry has been funded almost entirely by private capital, mega-VC rounds, and strategic cloud partnerships. An OpenAI IPO would move the sector from speculative research bets into the realm of audited financials, quarterly guidance, and retail investors. Whether that transition proves the maturity of AI — or pops the valuation bubble — will shape the next decade of the technology.

What OpenAI actually filed

OpenAI's filing was made confidentially, which allows the SEC to review draft paperwork before a public S-1 is released. In an official statement, the company said it had "not decided on timing yet; it may be a while because there are things we want to do that are likely easier as a private company." It added that the filing "gives us the option to go public sooner if that ends up being best."

That cautious language matches the standard IPO playbook — but it also reflects real uncertainty. OpenAI was last valued at roughly $850 billion after closing a $122 billion funding round in March 2026, the largest private financing in Silicon Valley history. Goldman Sachs, Morgan Stanley, and JPMorgan are reportedly leading the offering. A listing could happen as soon as September 2026, according to analyst estimates, though OpenAI itself has given no date.

The broader AI IPO wave

OpenAI is not alone. Anthropic filed confidentially around June 1, 2026, after raising a $65 billion Series H in late May at a $965 billion post-money valuation. That means Anthropic — the smaller, younger, enterprise-focused rival — briefly overtook OpenAI in headline private-market valuation. SpaceX is also expected to go public soon at an estimated $1.75 trillion, and may be the first of the three to list, soaking up a large share of available tech IPO capital.

The concentration of mega-IPOs is unusual. TechCrunch noted that three of the most closely watched private companies could debut within months of each other, a clustering not seen since the dot-com era. For investors, that creates both opportunity and scarcity pressure: whichever AI company lists first will likely capture more of the finite pool of public-market capital allocated to frontier AI.

Why the rush? The financial math is not pretty

Going public is expensive, distracting, and heavily regulated. So why are OpenAI and Anthropic hurrying now? Because both companies are burning unprecedented amounts of money — and neither can fund itself indefinitely in private markets.

OpenAI's projected 2028 spending tells the story. According to reporting from the Wall Street Journal and TechCrunch, the company expects to spend roughly $122 billion on compute for AI research alone in 2028, and to burn $85 billion in cash that year even after doubling sales. It does not expect to be cash-flow positive for at least four more years. CFO Sarah Friar has reportedly raised internal concerns that OpenAI may not be able to support its data-center spending at current rates.

That is the central contradiction of the generative-AI business model: revenue is growing rapidly, but inference and training costs are growing faster. OpenAI reportedly lost about $1.22 for every dollar it earned in a recent quarter. Public markets will not tolerate that ratio forever. An IPO gives OpenAI access to a deeper capital pool, diversified investors, and acquisition currency — but it also exposes those economics to daily scrutiny.

The narrative battle: OpenAI's consumer empire vs. Anthropic's enterprise momentum

OpenAI and Anthropic are increasingly framed as the two "dual winners" of the large-language-model race, but their profiles differ sharply.

OpenAI's strength is scale and consumer adoption. ChatGPT had roughly 900 million weekly active users as of early 2026, making it one of the fastest-growing consumer products in history. That reach gives OpenAI enormous distribution power, brand recognition, and a massive training signal from real user interactions.

Anthropic, by contrast, has leaned harder into enterprise customers, safety marketing, and technical credibility. Its Claude models have gained traction among developers and organizations that want more controllable, less sycophantic AI. In some enterprise surveys, Anthropic has even pulled ahead of OpenAI in paid customer preference. Its secondary-market shares appreciated 123% year-to-date as of early June, versus 11.3% for OpenAI, according to Forge Global data cited in the coverage.

That performance gap matters because Anthropic's public S-1 will set the first valuation benchmark for a pure-play frontier-AI company. If Anthropic prices conservatively, OpenAI's $850 billion target becomes harder to defend. If Anthropic's offering pops, OpenAI benefits from the sector-wide re-rating. The two companies are competitors and, for the next few months, each other's most important comparable.

OpenAI's IPO roadshow will have to answer questions that most software companies never face. The 2023 board coup that briefly ousted CEO Sam Altman, the unusual nonprofit-to-capped-profit structure, the departure of co-founder Ilya Sutskever, and recurring lawsuits will all be scrutinized by institutional investors.

Recent legal developments have been mixed. In May 2026, a jury dismissed Elon Musk's lawsuit against OpenAI on statute-of-limitations grounds, removing one high-profile obstacle. But Florida has sued OpenAI and Altman, alleging that ChatGPT harmed children by facilitating self-harm, addiction, and school violence. Other lawsuits tied to user delusions and mass-casualty events remain pending. Governance concerns are compounded by political scrutiny, including multi-million-dollar donations by OpenAI president Greg Brockman and his wife to pro-AI political action committees.

None of these issues are likely to block an IPO. But they will influence pricing, disclosure language, and the risk premium investors demand.

What this means for AI builders and users

For developers, founders, and enterprise buyers, the IPO race is more than a spectator sport. Once OpenAI and Anthropic are public, their product roadmaps will be shaped by quarterly revenue pressure and shareholder expectations. That could accelerate monetization of consumer and API features, push more aggressive enterprise sales, and increase tension between safety commitments and growth targets.

It may also change the competitive landscape. Public-market access gives both companies more firepower to acquire startups, hire talent, and sign compute deals. Smaller AI labs and application-layer companies could face a tougher funding environment as public giants absorb capital and attention.

More broadly, the filings will force the market to price AI capabilities as a business rather than a science experiment. The result will be a public verdict on whether trillion-dollar valuations for loss-making model labs are justified — and that verdict will ripple through every layer of the industry.

What to watch next

The next milestones are the public S-1 filings, which must be released at least 15 days before any investor roadshow. Those documents will reveal audited revenue, cost structures, customer concentration, and forward-looking risks for the first time. Watch for OpenAI's gross margins, Anthropic's enterprise revenue mix, and how each company describes compute commitments and regulatory risk.

Also watch timing. If SpaceX lists first and sucks up available liquidity, both AI IPOs may price more conservatively. If market appetite remains strong, the dual listings could mint a new generation of tech wealth and entrench the OpenAI-Anthropic duopoly for years.

One thing is already clear: the era of AI as a private-market moonshot is ending. The next chapter will be written under the bright lights of Wall Street.

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