IT之家 reported on October 15 that Xiaomi began the first stable rollout of HyperOS 4, covering the Xiaomi 17 series (including Xiaomi 17 Ultra, 17 Pro Max, 17 Pro and 17), the REDMI K100 Pro Max, K100 Pro, K90 Pro Max and K90, and the Xiaomi Pad 8 series. The report says the release upgrades AI capabilities, cross-device collaboration and baseline smoothness, integrating Super Xiao Ai 2.0 with Xiaomi's in-house MiMo large model and adding features such as an expert mode and the Inspiration Ball interaction; Xiaomi's own claim is that the system is smoother and delivers a more fluid experience. Later batches are listed as extending by October 31 to the Xiaomi 17 Max, 17T series and REDMI K90 Max, reaching the Xiaomi 15 and REDMI K80 series by mid-November, the Xiaomi 14/13 series plus more tablets, TVs and wearables within December 2026, and some TVs and bands in January 2027.