OpenAI Raises $30B at $1.4T Ahead of Anthropic IPO

OpenAI is racing to lock in about $30 billion in fresh funding at a valuation above $1.4 trillion, before Anthropic’s expected mid-November IPO hands investors a public price tag for the first time. The fundraising is moving faster than is typical for a round this size. That speed is the story.

Two frontier labs are competing for the same pools of capital at the same time, and OpenAI wants to make sure the money commits before Anthropic’s disclosures invite comparisons.

What happened

OpenAI is seeking investor commitments ahead of Anthropic’s expected public debut in mid-November, according to two people familiar with the matter who spoke to Reuters. The round is about $30 billion. SoftBank Group, Abu Dhabi-based MGX, and other existing backers are in talks to join.

OpenAI held meetings with long-only funds and sovereign wealth funds last week, while Anthropic was hosting its own investor day. Investors familiar with the company say OpenAI wants to get ahead of Anthropic because the two labs are increasingly tapping the same investor base. One source framed the motivation bluntly: lock in capital from funds that might otherwise devote more of their resources to Anthropic’s IPO.

The company also needs the money for a second reason. OpenAI has substantial infrastructure commitments to fund, and it wants a stronger balance sheet in case weak IPO markets push its planned 2027 listing further out.

The valuation math

OpenAI was last valued at $852 billion in March after a $122 billion round that included a commitment from Amazon to invest up to $50 billion. A $1.4 trillion valuation would be a huge step up in seven months.

OpenAI is pitching investors on growth that accelerated after the launch of GPT-6 Astra. It says it has reached $50 billion in annualized revenue and expects that figure to rise to $70 billion by year end. It has also cut prices on its cheaper models, which it says boosted usage, and told investors it can push prices lower still.

Anthropic’s numbers tell a slightly different story. Its annualized revenue reached roughly $65 billion by July, Reuters previously reported. Third quarter revenue hit $16.8 billion, up from $11.6 billion in the second quarter, but slowing month-to-month growth has raised concerns about its valuation. Some existing and prospective Anthropic investors have argued for a $1.5 trillion debut valuation instead of the desired $2 trillion.

The revenue-accounting fight

This is where the fundraising gets interesting. OpenAI records revenue on a net basis, subtracting partner shares upfront. It has accused Anthropic of inflating its revenue by counting the full, gross value of contracts sold through third-party cloud providers. Anthropic told Reuters it follows established accounting practices.

Strip away the accounting language and this is a fight over the narrative. When two companies raise money at trillion-dollar valuations within weeks of each other, the one whose numbers investors understand first gets to set the terms. OpenAI’s CFO Sarah Friar could face pressure to explain the revenue growth in more detail once Anthropic’s disclosures are public. Completing the raise before those disclosures land avoids that scrutiny.

As one capital markets lawyer put it to Reuters, OpenAI wants to “set its own valuation and not have to worry about a comp.” There are only two horses in this race.

A choppy market makes timing matter

The fundraising is happening against a rough market backdrop. Since September, volatility in oil prices, rising bond yields, and growing concerns about AI safety have weighed on technology stocks. Investors are scrutinizing the cost of AI infrastructure, including the debt financing the data centers powering the boom.

CoreWeave is at the center of the worry. Its shares and debt tumbled last week as investors scrutinized the nearly $50 billion in borrowings used to fund its rapid expansion. Companies in the Philadelphia Semiconductor Index, widely viewed as a proxy for AI semiconductor demand, have shed $1.6 trillion in under two weeks.

The uncertainty has disrupted the autumn IPO calendar. Blackstone-backed AirTrunk REIT, Nvidia-backed Firmus, and SoftBank-backed SB Energy have either pulled or paused their listings. Several companies preparing to go public decided to wait until after Anthropic’s planned IPO, wary of competing for investor demand. Others are timing private rounds to avoid clashing with it.

In that environment, raising $30 billion privately before the public market reprices anything is not just speed. It is insurance.

What this means for builders

The frontier labs are now fighting a capital war as much as a model war. That changes what builders should watch.

First, the labs’ economics depend on inference revenue growing fast enough to justify these valuations. OpenAI cutting model prices and still projecting $70 billion in annualized revenue tells you the plan: win on volume, make up in scale. Model pricing pressure is a feature of their strategy, not a temporary discount. Build accordingly.

Second, keep your inference portable. When the winners are decided by who raises the most and prices the lowest, the models you build on today may not be the cheapest or the best in six months. Abstract the model layer now, while switching costs are still manageable.

Third, watch Anthropic’s IPO disclosures. When a company this size goes public, its S-1 tells the whole industry what the unit economics of a frontier lab actually look like. That document will matter more to your cost planning than any benchmark score.

The models still get the headlines. But the race between OpenAI and Anthropic this autumn is being run on cap tables, and the winner gets to define what a trillion-dollar AI company is worth.

Sources

Reuters reporting via The Hindu BusinessLine, “OpenAI seeks $30 billion funding at $1.4 trillion valuation ahead of Anthropic IPO,” updated October 20, 2026

Financial Times, prior reporting on OpenAI’s fundraising (referenced in the Reuters piece)