The public release is expected in spring 2026 with the iOS 26.4 update. Apple hasn't given an exact date yet — they're talking about a "release later in 2026" — and for now they're preparing a demonstration in late February.
Promised features:
— Smarter context understanding: Siri will be able to see what's on screen and help complete the current task (mail, messages, browser, etc.).
— Deep integration with on-device personal data: mail, messages, calendars and other apps for executing more complex action chains.
— Multi-step scenarios in third-party apps (for example, find an email, extract data, and immediately add it to a note or calendar).
— Down the road — a separate Siri chatbot version codenamed Campos in iOS 27, which would turn Siri into a full-fledged conversational assistant like ChatGPT/Gemini.