For years, investors have watched the biggest AI companies grow at a distance.
They have seen enormous funding rounds, soaring private valuations, massive spending on computing power and an increasingly competitive race to build the next generation of AI models.
Now, that story may be moving closer to the public markets.
Anthropic appears to be preparing for a potential IPO as early as September or October 2026, while OpenAI is reportedly taking a more cautious approach and could push its listing into 2027.
That difference in timing could matter far beyond the two companies.
If Anthropic lists first, public investors will get one of their first real opportunities to put a market price on a frontier AI company at enormous scale. And that valuation could become an important reference point for OpenAI, along with the wider AI industry.
The interesting part is that this is no longer simply a race to build the best model. It is becoming a race to prove that these companies can turn AI leadership into durable businesses.
Anthropic Is Moving First
Anthropic has emerged as the company closest to the public markets.
The company is reportedly meeting potential investors ahead of a possible September or early October IPO, with executives addressing questions around growth, competition from cheaper Chinese AI systems and concerns surrounding the company’s expanding influence.
That investor outreach is important.
A company approaching a public listing has to answer a different set of questions than a private startup raising another funding round.
Private investors can make a long-term bet on a company’s technology and market potential. Public investors are going to ask much more directly:
How big can the business become?
How profitable can it be?
How much will it cost to keep competing?
And is today’s valuation justified by the numbers?
Anthropic already has a strong commercial story to tell.
The company has been building momentum with enterprise customers, while Claude Code has become an important part of its growth strategy. It has also signed additional computing agreements with companies including Google and SpaceX.
Its valuation has moved rapidly as well.
Anthropic was valued at around $965 billion following its May funding round, and reports have put a potential IPO valuation at around $1 trillion or more.
That is an extraordinary number for a company that was founded only in 2021.
And that is exactly why the IPO will attract so much attention.
The Bigger Question: Can AI Companies Grow Into Their Valuations?
The AI market has become comfortable with enormous numbers.
But the public market eventually forces those numbers to meet financial reality.
That is where Anthropic’s IPO becomes particularly interesting.
The company has demonstrated strong demand for its products. Enterprise customers are increasingly using AI for coding, productivity and other business functions, while the company’s annualized revenue has been rising quickly.
At the same time, frontier AI is expensive to build and operate.
The companies need huge amounts of computing power. They need access to advanced chips. They need data centers and energy. They need highly paid researchers and engineers.
So investors are not simply buying into revenue growth.
They are also buying into a future where AI companies can generate enough revenue and margins to justify the enormous cost of staying at the front of the race.
That is the real test.
A $1 trillion valuation sounds impressive. The harder question is what the business has to look like five or ten years from now to make that valuation reasonable.
Then There Is OpenAI
OpenAI is in a different position.
It remains one of the most recognizable names in technology, largely because ChatGPT helped bring generative AI into everyday life.
But its IPO timeline appears less certain.
OpenAI was valued at about $852 billion in March, while reports have suggested that the company could target a public valuation approaching $1 trillion. At the same time, reporting has indicated that its IPO could be delayed until 2027.
That puts OpenAI in an unusual position.
The company does not necessarily need to be first. But if Anthropic goes public first, OpenAI will have to operate in a market where investors already have a public benchmark for valuing a frontier AI company.
That could make Anthropic’s debut especially important.
If Anthropic receives a strong reception, OpenAI could point to that valuation as evidence of the market’s appetite for AI leaders.
If Anthropic struggles, however, the lesson could be very different.
Public investors may become more cautious about paying enormous multiples for companies that still require huge amounts of capital to compete.
OpenAI Is Already Working on the Business Side
OpenAI is not sitting still while Anthropic prepares.
The company has been pushing further into enterprise software and expanding its product offering.
It launched GPT-5.6 in July and has continued building out Codex and its workplace tools. It has also expanded its enterprise partner network and introduced additional products aimed at business users.
There is a clear reason behind that push.
Consumer attention is valuable, but enterprise spending can become a much more meaningful source of recurring revenue.
That is why the competition between OpenAI and Anthropic increasingly looks like more than a model race.
It is a business model race.
Who can get companies to integrate AI deeply into their operations?
Who can turn AI assistants and coding tools into essential software?
Who can keep customers paying as models become cheaper and competition increases?
Those questions will matter enormously once investors can actually buy the stocks.
The Open-Weight Challenge Is Getting Harder to Ignore
One of the biggest risks for both companies is the rise of cheaper and increasingly capable open-weight AI models.
The traditional argument is straightforward.
If businesses can access powerful models at a fraction of the cost, why pay premium prices for frontier AI?
That could put pressure on the economics of companies like Anthropic and OpenAI.
But there is another argument.
ARK Invest’s Cathie Wood has suggested that stronger open-weight models could actually increase demand for frontier AI because they can also increase cybersecurity risks. In that view, businesses may need highly capable proprietary models to defend against increasingly sophisticated AI-driven attacks.
It is a fascinating debate because both sides are looking at the same technological development and reaching different conclusions.
Does cheaper AI destroy the premium AI business model, or does it make high-end AI even more valuable?
The public markets will eventually have to decide.
Why Anthropic’s IPO Could Matter to OpenAI
This is where the timing becomes particularly important.
Anthropic and OpenAI are competing for many of the same customers, talent and infrastructure resources.
But they are also about to compete for something else:
Investor expectations.
If Anthropic lists first, its market capitalization, revenue multiple and investor reception will give the market a real-world reference point.
OpenAI will then have to be judged against that benchmark.
That does not mean investors will value the two companies identically. Their products, growth rates, costs, partnerships and strategies are different.
But a public Anthropic would make the conversation much more concrete.
Instead of asking, “What might a frontier AI company be worth?”
Investors could ask:
“What is Anthropic worth, and what does that tell us about OpenAI?”
That is a major shift.
AI Funding Has Already Become Extremely Concentrated
The IPO race is also happening against a remarkable backdrop for AI funding.
AI startups raised more than $407 billion in venture funding during the first half of 2026, according to PitchBook data cited in the supplied report. That already surpassed the $264 billion invested in AI startups across all of 2025.
But the most striking part is where that money went.
OpenAI and Anthropic together accounted for roughly $217 billion, more than half of the first-half total.
That money came through just three funding rounds:
- OpenAI: $122 billion in March
- Anthropic: $65 billion Series H in May
- Anthropic: $30 billion Series G earlier in the year
That tells us something important about the current AI market.
Investors are not spreading capital evenly across hundreds of companies.
They are making enormous bets on a small group of companies they believe can dominate the underlying AI infrastructure and platforms.
That makes the eventual IPOs even more significant.
The Market Is About to Get a Reality Check
Private valuations can rise rapidly when investors are competing to get into a company.
Public markets are different.
Once a company lists, investors can buy and sell shares every day. The valuation moves constantly. Earnings reports arrive every quarter. Guidance matters. Margins matter. Cash flow matters.
And suddenly, a company’s valuation is not just a number attached to a funding round.
It is a number the market can challenge every day.
That is why the Anthropic IPO could become a defining moment for the AI industry.
It will give public investors a chance to decide what a trillion-dollar AI company should actually be worth.
Amazon Could Be One of the Biggest Companies Watching
Anthropic’s IPO is not only important for Anthropic.
Amazon has built a significant relationship with the AI company.
Amazon owns a reported 21% stake in Anthropic, built through investments of $8 billion in 2024 and another $5 billion earlier this year. At a $1 trillion Anthropic valuation, that stake could theoretically be worth more than $200 billion.
But the relationship goes deeper than an equity stake.
Anthropic relies heavily on Amazon Web Services and Amazon’s custom AI chips.
That creates an interesting connection.
If Anthropic grows, Amazon can potentially benefit not only from the value of its stake, but also from the infrastructure spending that supports Anthropic’s expansion.
For investors watching Amazon, Anthropic’s public debut could therefore become another important piece of the AI investment story.
What Should Investors Actually Watch?
The headline valuation will get most of the attention.
It should not be the only thing investors watch.
There are several numbers and signals that could matter more.
1. Revenue growth
A trillion-dollar valuation needs a business capable of growing into it.
Investors will want to know whether Anthropic’s rapid revenue growth can continue once it becomes a public company.
2. Enterprise demand
Both companies are increasingly focused on businesses.
That is important because enterprise customers can provide recurring revenue and integrate AI more deeply into their workflows.
Claude Code’s growth has already made enterprise adoption an important part of Anthropic’s story.
3. Compute costs
This could be one of the biggest issues of all.
AI companies can generate enormous revenue and still spend enormous amounts on computing infrastructure.
Investors will want to understand whether scale eventually improves the economics.
4. Pricing pressure
As more capable models become cheaper, premium pricing could become harder to maintain.
The rise of open-weight models and lower-cost AI offerings makes this a key issue for both companies.
5. Customer retention
It is one thing to get companies to try AI.
It is another thing to get them to build important parts of their business around it.
Long-term customer retention could become one of the strongest indicators of whether AI companies have built durable businesses.
6. The IPO reception
The first few weeks of trading could tell us a lot about investor appetite.
A strong debut would suggest that public investors are comfortable paying a premium for AI growth.
A weak debut could force the entire sector to rethink private valuations.
The Real Winner May Not Be the First Company to List
It is tempting to treat this as a simple race.
Anthropic goes public first.
OpenAI follows.
One wins, one loses.
But the bigger story is more complicated.
The winner could ultimately be the company that proves AI can become a durable, profitable business rather than simply an extraordinarily valuable technology.
Anthropic appears to be moving toward that test first.
OpenAI may get more time to watch the market, refine its enterprise strategy and decide when the conditions are right.
Neither approach is automatically better.
Going public first creates an opportunity to establish the benchmark.
Waiting creates an opportunity to learn from the market’s reaction.
What This Means for the AI Investment Story
The AI boom has largely been an infrastructure and private-market story so far.
Investors have poured money into chips, data centers, cloud providers and private AI companies.
Now the frontier model companies themselves are approaching public markets.
That changes the conversation.
Instead of simply asking which companies will supply the AI boom, investors will increasingly ask which companies will capture the economics of AI.
That is a much bigger question.
And the answer could shape how the market values the entire AI ecosystem for years.
Anthropic’s potential fall IPO could be the first major test. OpenAI’s eventual listing could be the bigger one.
For investors, the most interesting part may not be which company reaches the market first.
It may be what the market decides they are actually worth once the excitement meets the numbers.