Apple is preparing to power its AI-upgraded Siri with a custom version of Google’s Gemini AI model, according to a report from Bloomberg’s Mark Gurman. The iPhone maker will reportedly pay Google around $1 billion annually to gain access to the technology, which will generate summaries and perform planning-related tasks.

As noted by Bloomberg, Apple will run the custom Gemini model on its Private Cloud Compute servers, though it will continue to use in-house models to power some Siri features. Gurman reports that the Gemini model will use 1.2 trillion parameters to help inform its responses, far greater than the 150 billion-parameter model behind the cloud-based version of Apple Intelligence.

Last week, Apple CEO Tim Cook told investors that the new Siri is set to arrive next spring, while also leaving the door open for more third-party AI integrations with Apple Intelligence. Though Apple is reportedly moving forward on a deal with Google, Bloomberg says Apple will continue developing its own AI technology that it could use to eventually replace Gemini.