Apple Inc. is planning to pay about $1 billion a year for an ultrapowerful 1.2 trillion parameter artificial intelligence model developed by Alphabet Inc.’s Google that would help run its long-promised overhaul of the Siri voice assistant,

Apple Inc. is planning to use a 1.2 trillion parameter artificial intelligence model developed by Alphabet Inc.’s Google to help power its long-promised overhaul of the Siri voice assistant, according...

The company is developing its own large-scale AI model, aiming for a similar level of power as Google’s Gemini as early as next year.