Apple offers an upgraded Siri voice assistant — now called Siri AI — powered by Apple Intelligence and, since January 2026, co-developed with Google's Gemini models. The upgraded Siri launched incrementally starting with iOS 18.1 in October 2024 and received its most significant overhaul at WWDC 2026, gaining system-wide personal context awareness, cross-app action-taking, and on-screen content understanding.

The redesigned Siri uses Apple's own foundation models — large language models trained on large amounts of text to understand and generate human-like responses — alongside Google Gemini for cloud-based tasks. Apple announced a multi-year partnership with Google in January 2026, confirmed by a joint statement, to integrate Google's Gemini architecture into Apple Foundation Models. At WWDC 2026, Apple unveiled Siri AI as a standalone app with a dedicated interface, capable of understanding personal context across emails, messages, photos, and calendar data, and taking actions within apps. For queries exceeding Siri's on-device capabilities, users can also route questions to OpenAI's ChatGPT (GPT-4o model). The most advanced Siri capabilities announced at WWDC 2024 were delayed until 2026, with a 'V2' architecture expected in iOS/macOS 27.