OpenAI says its ad business has hit $1B in annualized revenue run rate and is expanding globally, as it touts its "diversified business model" ahead of an IPO (Ashley Capoot/CNBC)

OpenAI announced that its advertising business has achieved a $1 billion annualized revenue run rate. The company is expanding its ad business globally and is highlighting its "diversified business model." This announcement comes as OpenAI prepares for a potential Initial Public Offering (IPO), showcasing its financial growth and strategic market expansion.