OpenAI tops $25 billion in annualized revenue and explores a 2026 IPO

OpenAI has crossed $25 billion in annualized revenue, a figure that would have sounded implausible for an AI research lab just three years ago. The company is also reportedly taking early steps toward a public listing as soon as late 2026. Those two facts together tell a specific story: OpenAI is no longer positioning itself as a research organization that happens to have a product. It is operating as a large-scale commercial software business, and it wants public market access to match.

For context, OpenAI's annualized revenue was around $1.6 billion in early 2023. The jump to $25 billion in roughly two years is driven almost entirely by ChatGPT subscriptions and API usage fees paid by developers and enterprises building on GPT-4o and o-series models. The consumer product and the developer platform grew in parallel, which is unusual. Most software companies see one channel dominate. OpenAI has both firing at the same time.

Anthropic at $19 billion shows how fast this market has grown

Anthropic, OpenAI's closest direct competitor in the frontier model space, is approaching $19 billion in annualized revenue. That number deserves its own moment of attention. Anthropic was founded in 2021 by former OpenAI employees, has never had a consumer product with anything close to ChatGPT's reach, and has focused primarily on enterprise API sales and its Claude model family. Reaching $19 billion from that starting point means the enterprise market for AI API access is substantially larger than most observers predicted two years ago.

The gap between OpenAI and Anthropic is real but not as wide as the raw numbers suggest when you consider their different distribution strategies. OpenAI has tens of millions of paying ChatGPT subscribers in addition to API revenue. Anthropic's revenue is almost entirely business-to-business. On a pure enterprise API basis, the two companies are probably closer than the $6 billion difference implies.

What an OpenAI IPO would actually look like

OpenAI's path to a public listing is complicated by its corporate structure. The company was founded as a nonprofit and has operated through a capped-profit subsidiary, which limits investor returns and creates legal obligations that do not exist in standard for-profit companies. OpenAI has been working to restructure into a more conventional for-profit corporation, a process that requires approval from its nonprofit board and, depending on how the conversion is handled, review from the California Attorney General's office.

Assuming that restructuring completes successfully, the IPO itself would rank among the largest technology listings in recent years. OpenAI was valued at $157 billion in its October 2024 funding round. Public market valuations for high-growth software companies have historically been based on revenue multiples, and at $25 billion in annualized revenue, even a conservative multiple would produce a valuation well above that private round figure. The question for public investors will be how sustainable that revenue growth is once the initial enterprise adoption wave matures.

What drives the revenue at this scale

ChatGPT Plus, at $20 per month, and ChatGPT Pro, at $200 per month, account for a large portion of consumer revenue. The Pro tier launched in late 2024 and targets power users who need higher rate limits and access to the o1 pro model. On the enterprise side, OpenAI's API pricing runs on a per-token basis, with rates varying by model. A single large enterprise running GPT-4o across internal tools can generate millions of dollars in annual API spend. Microsoft, which has invested over $13 billion in OpenAI and distributes its models through Azure, adds another significant revenue channel that does not always show up clearly in public disclosures.

Investor interest and what it means for competition

The revenue figures from both OpenAI and Anthropic have intensified competition for AI investment dollars globally. Google, which has invested heavily in Anthropic and develops its own Gemini model family, is watching its cloud AI revenue grow while simultaneously funding a competitor. Amazon has committed up to $4 billion to Anthropic. Meta is spending at a similar scale on its Llama open-source model program. The capital concentration in this sector over the past 18 months is unlike anything in the software industry since the early cloud infrastructure buildout.

For OpenAI specifically, going public would provide a currency for acquisitions, reduce dependence on periodic large private funding rounds, and give early employees and investors liquidity. The company's most recent funding round in early 2025 was oversubscribed, which suggests public market demand would also be strong. Whether the IPO happens in late 2026 depends on the structural conversion timeline and broader market conditions, but the revenue foundation to support a listing is clearly already in place.