The browser is slated to launch in the coming weeks, three of the people said, and aims to use artificial intelligence to fundamentally change how consumers browse the web. It will give OpenAI more direct access to a cornerstone of Google's success: user data.

If adopted by the 500 million weekly active users of ChatGPT, OpenAI's browser could put pressure on a key component of rival Google's ad-money spigot. Chrome is an important pillar of Alphabet's ad business, which makes up nearly three-quarters of its revenue, as Chrome provides user information to help Alphabet target ads more effectively and profitably, and also gives Google a way to route search traffic to its own engine by default.