Private market investors chasing a piece of the leading AI labs are running into two very different price tags. To get into Anthropic right now typically requires at least 25 million dollars, and brokers say realistic access often starts closer to 50 million. A stake in OpenAI, by contrast, can be assembled for as little as half a million to a million dollars. The gap has become one of the clearest signals yet of how sharply investor appetite for the two companies has diverged.
A valuation flip few saw coming
Anthropic's implied valuation on secondary markets has climbed toward roughly 1.2 to 1.4 trillion dollars, up more than 400 percent over the past year according to data from the trading platform Caplight. OpenAI, which spent years commanding the higher price tag of the two labs, now carries an implied valuation of about 908 billion dollars on the same markets, a reversal that would have looked unlikely not long ago.
Scarcity, not sales, is setting the price
Javier Avalos, chief executive of Caplight, estimates roughly 1.5 billion dollars of investor interest in Anthropic shares has piled up since the second quarter of 2026 began, making it the most sought after name on the secondary market for close to a year running. The catch, he says, is that almost nobody who already holds a stake wants to sell, which means the sky high implied price reflects scarcity as much as it reflects genuine completed transactions.
Anthropic is tightening the door further
Anthropic has added to that scarcity itself by tightening its cap table approval process, now permitting secondary sales only in blocks of 20 million to 100 million dollars at a time. The policy effectively pushes smaller investors out of the market and concentrates access among the largest funds and family offices willing to write the biggest checks.
Clara Vydyanath, a general partner at Underline Capital, put the entry math bluntly. Below 25 million dollars is difficult, she said, and a realistic position generally has to be 50 million dollars or more. Christine Healey, founder of the brokerage Healey Pre-IPO, described demand for Anthropic shares as running roughly three to five times available supply, with even large ticket sizes struggling to find a willing seller.
A price that almost nobody can transact at is still a price, and right now it is telling investors more about scarcity than it is about earnings.
Is OpenAI actually the better deal
Not every investor reads the gap as proof Anthropic deserves the premium. Right now, Vydyanath said, OpenAI feels underpriced and Anthropic feels overpriced, adding that in reality OpenAI looks like a phenomenal deal at current levels. That contrarian view runs against the prevailing momentum on trading desks, where Anthropic has stayed the harder ticket to get for the better part of a year.
Both companies are widely expected to eventually test public markets, with some reports pointing to Anthropic pursuing a listing that could target a valuation near 2 trillion dollars as soon as this coming October. Until either lab actually goes public, though, the current gap between a half million dollar entry point and a 25 million dollar one stands as the clearest real time verdict investors have given on which of the two they believe in more.
