OpenAI announced on Monday that its advertising division has reached an annualized revenue run rate of $1 billion, with the company characterizing this milestone as validation of its "diversified business model." The artificial intelligence firm is preparing for what is expected to be a massive initial public offering while facing mounting pressure to justify its $852 billion valuation to prospective investors.

According to OpenAI, the advertising business has been operational for approximately 200 days, building atop existing revenue pillars including enterprise services, individual subscriptions, and usage-based API access. In February, the company initiated ad testing within its ChatGPT chatbot across the United States — a move that was both highly anticipated and controversial. Digital advertising has long served as a cash cow for tech giants such as Google and Meta, but OpenAI's foray into this space drew sharp criticism from chief rival Anthropic, which even made OpenAI's advertising push the centerpiece of its inaugural Super Bowl campaign.

ChatGPT ads are now available in more than 40 countries, and OpenAI stated that self-serve advertising access will expand to India, Europe, the Middle East, and North Africa starting Monday. In-chatbot advertisements are displayed to both OpenAI Go subscribers and free-tier users, with the latter group constituting the overwhelming majority of the platform's 1 billion weekly active users.

OpenAI clarified on Monday that platform advertisements are clearly labeled, do not interfere with ChatGPT's response content, and that advertisers cannot access users' private conversation records. The company stated: "In the next phase, we will expand ChatGPT advertising to additional markets and introduce more ad formats, marketing objectives, purchasing options, and performance measurement tools. We will also explore new pathways for businesses to engage with consumers within ChatGPT in more native ways."