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Xiaomi’s software update has received its most significant officially confirmed release dates in recent years. Numerous insiders in the Chinese tech industry point to August as the month when HyperOS 4 will officially debut. This release is scheduled to coincide with the unveiling of the Xiaomi 18 smartphone lineup or, quite possibly, the new Mix Fold 5 foldable smartphone. At the same time, specific performance metrics have been revealed for the first time, confirming claims of a major overhaul of the system.
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According to available information, the launch of HyperOS 4 in China is scheduled for August 2026, while the international release is set for October, which is fully in line with the release schedule for the previous HyperOS 3 last year. This operating system is built entirely on Rust and Flutter, allowing developers to finally eliminate all remnants of the old MIUI code. This makes it the company’s first platform with a completely clean system architecture.
Typically, during presentations of new operating systems, developers limit themselves to vague adjectives such as “smoother,” “faster,” or “more efficient.” However, the leak regarding HyperOS 4 demonstrates a completely different approach, as it includes specific numerical data. Preliminary internal tests show a 40% improvement in interface responsiveness, a 35% increase in the efficiency of keeping apps running in the background, a 25–30% reduction in RAM consumption in standby mode, and a performance drop of only 5% after 12 months of use.
Data transfer speeds between Xiaomi devices can increase by up to 300%, ensuring seamless app operation on smartphones, tablets, and personal computers. The built-in artificial intelligence, represented by the Mimo and Miclaw tools, operates entirely locally without an internet connection, enabling the creation of condensed document summaries, translation into various languages, and image editing without the use of cloud servers.
It is important to note that these figures are the results of internal testing, not tests by independent experts, so they should be taken with a grain of salt. However, having precise metrics is of great importance, since vague promises are easy to make and impossible to verify, whereas specific percentages can be tested under real-world conditions after the official release. Since Xiaomi included these figures in its materials for preliminary briefings, the company is clearly confident in its data and is not afraid of future comparisons in journalists’ reviews.
The primary foundation for all of this is the use of the Rust and Flutter programming languages. Rust’s memory safety model eliminates entire categories of errors that typically occurred in older Android interfaces built on outdated C/C++ frameworks. At the same time, Flutter ensures a consistent user interface across all devices in the company’s ecosystem – including smartphones, tablets, TVs, and cars – using a single codebase. This is a testament to serious engineering work, not just a cosmetic design update.
A 300% increase in file transfer speeds between Xiaomi devices sounds like a great news headline. However, the app continuity feature is far more interesting; it allows you to start a task on your smartphone and continue it on a tablet or computer without losing your progress. Xiaomi demonstrated similar capabilities back in HyperOS 3, but at that time, the feature’s performance was not particularly stable. A dedicated unified AI coordination system in HyperOS 4 is designed to address this shortcoming, transforming cross-device task transfer into a reliable feature on par with Apple’s Continuity – rather than just a standard presentation mode.
The local AI toolkit, which includes Mimo for summarizing texts and translations, as well as Miclaw for assistant functions, is a privacy-focused move. This sets Xiaomi apart from competitors whose AI relies on cloud computing. No user data is transmitted outside the device, response times are significantly faster than when processing requests via the cloud, and it all works even while flying on an airplane.
According to previously confirmed information from the insider Digital Chat Station, owners of Xiaomi 17 series devices and Redmi K90 models will be the first to test the beta version of HyperOS 4 in China. The rollout of the stable version of the software will begin in September with the Xiaomi 18 and 18 Pro Max smartphones. By the end of the year, the update will expand to the Xiaomi 15 and 14 lines and the Redmi K90 series. Devices for the international market typically receive the new firmware four to six weeks later than those in China.
If you own adevice on the supported list and want to be among the first to try the update, keep an eye out for announcements about tester recruitment in the dedicated section of the Mi Community app, or check for news right when the update is released.
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