Anthropic tells investors its annualized revenue run rate climbed to $65 billion in July, a sevenfold increase from a year earlier. The company also reported a preliminary revenue of $11.5 billion for the second quarter, a 14-fold jump from a year ago. This update comes as Anthropic prepares for a potential IPO, having confidentially filed its prospectus with the SEC in June. Rival OpenAI recently reported an annualized revenue run rate of $40 billion.