That's according to a report by the Financial Times.
It cites two people familiar with the startup's finances.
There was no comment from the ChatGPT maker or from Microsoft, its big backer.
The report says OpenAI believes it can double that number in 2025.
It's reportedly seeing strong interest from business customers who want to use its applications in the workplace.
The San Francisco-based outfit has been valued at over $80 billion.
Boss Sam Altman is now said to be in talks with investors, including the UAE, over an initiative to boost the supply of chips for AI products.
The Wall Street Journal says the project could require raising as much as $7 trillion dollars.
Altman is said to be pitching it as a partnership between OpenAI, investors, chip makers and power providers.
