What's happening
OpenAI has surpassed $25 billion in annualized revenue and is reportedly taking early steps toward a public listing, potentially as soon as late 2026. The company's revenue growth has been driven by enterprise adoption of its GPT models, the rapid scaling of ChatGPT's subscription base, and expanding API consumption by developers building AI-powered applications.
Rival Anthropic is approaching $19 billion in annualized revenue, driven by strong enterprise demand for its Claude models and growing API usage across financial services, healthcare, and technology sectors. Together, the two leading AI labs are generating combined revenue approaching $44 billion annually — a figure that would place them among the largest enterprise software companies globally.
Why it matters for markets
The revenue figures validate the commercial viability of frontier AI models at a scale that was considered unlikely just two years ago. In 2024, combined revenue for the two companies was estimated at under $5 billion. The roughly 8x growth in two years represents one of the fastest revenue ramps in technology history, exceeding the early growth trajectories of companies like Salesforce, AWS, and Google Cloud.
For investors, OpenAI's potential IPO would be the most significant technology public offering since the initial wave of AI enthusiasm began in 2023. OpenAI's $852 billion valuation, established by its record $122 billion funding round completed on March 31, 2026, would make a potential IPO one of the largest technology public offerings ever, reflecting both the revenue growth trajectory and the market's expectations for AI's role in the global economy.
The competitive dynamic between OpenAI and Anthropic is driving rapid model improvement and aggressive pricing, which benefits enterprise customers but creates margin pressure for both companies. Both are spending heavily on compute infrastructure, with training costs for frontier models now exceeding $1 billion per run.
Sectors and assets to watch
Microsoft (MSFT) holds a significant equity position in OpenAI and generates Azure revenue from hosting OpenAI's models, making it the most direct public market proxy for OpenAI's growth. Google (GOOGL) competes through its Gemini models and is also an investor in Anthropic, creating complex competitive dynamics.
Nvidia (NVDA) and AMD (AMD) are the primary infrastructure beneficiaries, supplying the GPU compute that powers both companies' training and inference operations. The scale of compute spending by OpenAI and Anthropic alone represents a significant portion of the total AI accelerator market.
Cloud infrastructure providers hosting AI workloads, semiconductor equipment makers, and data center operators all benefit from the sustained growth in AI model deployment.
What to watch next
Track OpenAI's IPO timeline and any S-1 filing for detailed financial disclosures. Monitor Anthropic's fundraising activity and any signals about its own public market plans. Watch quarterly revenue growth rates for signs of acceleration or deceleration in enterprise AI adoption.
Key metrics include customer concentration (how dependent each company is on a small number of large customers), gross margins (whether revenue growth is translating to profitability), and compute cost trends (whether training and inference costs are declining fast enough to support sustainable margins).