iOS 26.4: insider leaks reveal release timing and a major Siri upgrade
The interim iOS 26.4 update could become one of the key milestones in the development of Apple Intelligence in 2026. According to insider reports confirmed by multiple industry sources, Apple plans to launch its long-awaited expanded AI upgrade for Siri specifically in version 26.4, after several previous delays.
This is not a routine point update. The changes described in the leaks point to system-level improvements that affect how the voice assistant works, how it is personalized, and how it interacts with on-screen content across the operating system.
When iOS 26.4 is expected and why it is earlier than anticipated
According to insider information, the release of the updated Siri is now planned as part of iOS 26.4. The update is expected to arrive in spring 2026, most likely between March and May.
This timing is notable because earlier insider expectations pointed to summer 2026 as the earliest possible window for Siri’s new AI features. Moving the release to spring suggests that Apple has been able to accelerate development and integration of key components.
At the time of writing, Apple is testing iOS 26.3. Version 26.4 is viewed internally as the next major step in the evolution of Apple Intelligence within the iOS 26 release cycle.
What will change in Siri with iOS 26.4
According to insider reports, the defining feature of the new Siri will be what is described as “deep personal understanding” of the user. This refers to the assistant’s improved ability to take context, interaction history, and the current situation on the device into account.
The key changes mentioned in the leaks include:
- analysis of what is happening on the screen, with the ability to respond to content inside apps;
- faster retrieval of relevant information without the need for precisely worded queries;
- more advanced multi-step scenarios, allowing Siri to combine several actions within a single request.
Sources emphasize that this is not a cosmetic update, but a shift to a fundamentally different level of assistant logic.
Partnership with Google and Apple Foundation Models v10
Insider reports also point to the technical side of the update. According to the available information, Apple has accelerated development through cooperation with Google.
The leaks indicate that the new Siri in iOS 26.4 uses a system internally referred to as Apple Foundation Models version 10. This system is based on Gemini models and is reported to operate at a scale of approximately 1.2 trillion parameters.
It is important to note that this does not imply the launch of a standalone chatbot or a complete replacement of Siri. Gemini-based models are used as part of the Apple Intelligence infrastructure to handle complex requests, while Siri remains the primary user-facing interface.
In practice, insiders describe iOS 26.4 as the version in which Apple begins to implement AI capabilities that were announced earlier but were not ready for inclusion in the initial iOS 26 releases.
Analysts note that this update lays the groundwork for future development rather than representing the final stage of Siri’s evolution.
Plans for iOS 27 and a potential AI chatbot
Apple has previously indicated that Siri’s evolution will not be limited to updates within iOS 26. Earlier leaks pointed to the possible introduction of a full-featured AI chatbot in iOS 27, designed to operate closer to modern conversational models. More details on these plans are available in the article “Apple is preparing a next-generation Siri: iOS 27 and a potential AI chatbot”:
https://www.uitech.com.ua/en/news-en/siri-ios-27-and-a-potential-new-type-of-ai-chatbot/
According to insider information, Apple may go even further in iOS 27. The company is reportedly considering the launch of a full AI chatbot that would directly compete with ChatGPT and Google Gemini.
At this stage, these plans remain in an early phase, with no official confirmation from Apple. However, sources stress that iOS 26.4 is expected to serve as a transitional release between the traditional Siri experience and more advanced AI interfaces in the future.
What is known so far
So far, Apple has not officially commented on either the features of iOS 26.4 or the release timing of the updated Siri. All information is based on insider leaks and reports from sources close to development.
The first iOS 26.4 beta is expected to appear after testing of iOS 26.3 is completed, with the final list of features becoming clearer closer to the spring release.
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