Danny Weber
Insiders say Xiaomi is rebuilding HyperOS 4 around Rust, Flutter, local AI features and better long-term performance.
Xiaomi, according to Chinese insiders, may introduce HyperOS 4 in August. The update is already being described as one of the company’s biggest in years: it could appear alongside the Xiaomi 18 series or the foldable Mix Fold 5. For now, this is about internal tests rather than independent benchmarks, but the figures sound specific: Xiaomi has allegedly achieved a clear speed boost and less performance degradation over time.
The main technical bet in HyperOS 4 is a move to Rust and Flutter. Rust should improve stability and reduce errors typical of older C/C++ components, while Flutter may help unify the interface across Xiaomi phones, tablets, TVs and cars. That makes the update look less like a cosmetic shell refresh and more like a serious rebuild of the system base.
One of the key promises is better resistance to slowdown. According to internal data, performance loss after one year of use should be limited to about 5%. If that holds up in real tests, HyperOS 4 could become one of the longest-lasting Android skins and answer a common complaint about Chinese phones that start feeling noticeably slower over time.
Another focus is connectivity between devices. Xiaomi is rumored to speed up file transfers inside its ecosystem by up to 300%, but improved task continuity looks more important: users should be able to start work on a phone and continue on a tablet or PC without losing state. HyperOS 3 already showed similar features, but stability was not ideal. In HyperOS 4, a unified AI coordination system is expected to make them more reliable.
A set of offline AI features is also expected. Mimo will reportedly handle document summaries and translation, while Miclaw will focus on agent-style tasks. Because processing happens on the device, data should not be sent to the cloud, responses may arrive faster, and some features could work even without internet access. The first Chinese betas are rumored for Xiaomi 17 and Redmi K90 owners, while the stable release may start with Xiaomi 18 and 18 Pro Max in September before reaching Xiaomi 15, Xiaomi 14 and the Redmi K90 series by the end of the year.
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