After three generations of development over three years, Xiaomi HyperOS has completed the first phase of its journey from zero to one. The first generation broke away from the conventional idea of simply modifying Android, establishing a unified system foundation for the entire ecosystem of people, cars, and homes. The second generation focused on kernel scheduling capabilities, elevating resource allocation efficiency across all devices to a new level. The third generation refined the system's compilation and rendering mechanisms, laying a solid foundation for basic smoothness. Now, with Xiaomi HyperOS 4, Xiaomi has officially debuted three underlying technological breakthroughs alongside a fully upgraded AI capability.
Hands-on experience reveals the most immediate impressions can be summed up in four points: Its design has finally caught up with the mainstream standards of Android manufacturers, with texture and animations starting to rival iOS; fluidity is smoother and more natural than its predecessor, especially the seamless, continuous animations across the entire chain; the Super XiaoAI input method exceeded expectations and could now replace the third-party input method I have long used; and the comprehensively upgraded AI capability truly gives the system the warmth of proactive service.
Light and Sense Design: Finally Finding Its Own "Breathing" Feel
Previous generations of HyperOS often left the impression of "plenty of features but mediocre visual quality." HyperOS 4 continues and deepens the "Life-like Aesthetic" system introduced since OS 2, delivering a design with a stronger, more distinctive identity. The most obvious change is the new soft glass material. Simply put, the system interface looks like a piece of breathing glass 鈥?it can sense the page's hierarchy and ambient colors, dynamically adjusting its transparency and hue, creating a much stronger sense of visual depth than before. Paired with a color-blending technology, system icons automatically adapt their color tones based on the wallpaper, significantly improving the overall visual harmony of the interface.
Light-sensing interaction is another easily noticeable detail. When dragging an icon on the desktop, the surrounding icons emit a subtle glow with micro-movements; clicking a toggle in the control center also provides a light-and-dark feedback similar to a breathing light. These details are highly reminiscent of Apple's liquid glass effect, and since Apple introduced this design language, Android manufacturers have gradually followed suit. Xiaomi is admittedly not the earliest mover on this front.
While the overall effect is more impressive, it must be acknowledged that this light and color-blending effect currently only covers native system icons; third-party themes have not yet been adapted. This means that when desktop icons are switched to icons designed by third parties, the light effect is lost, and it remains unclear whether Xiaomi will open this effect to third-party creators. Furthermore, it is worth noting that this "soft glass" effect is currently only available on phones equipped with flagship chips (Snapdragon 8 Gen 4, Dimensity 9500, Xuanjie O1, and above). Other chipset products will not have access to these effects.
Customization freedom has also received several practical upgrades: the lock screen clock supports free scaling and position adjustment; when there are too many notifications, they automatically stack and organize without distorting the lock screen clock; folders support dragging to resize, allowing free switching between sizes like 1x1, 1x2, 2x2, and 4x2; and widgets can be stacked for storage, allowing you to swipe up and down like flipping through a magazine. The "one-shot" animation has been further expanded, achieving a seamless transition where applications "return to where they came from." Major third-party apps like Xiaohongshu, Tencent Video, Bilibili, and Pinduoduo have all been adapted, significantly improving the responsiveness and visual coherence when opening and closing apps.
Objectively speaking, these design details are not industry-first innovations, but HyperOS has, for the first time, integrated glass texture, micro-animations, and personalized freedom into a complete visual system. In terms of design, this generation has truly caught up to the level of the mainstream camp.
Fluidity: From Passive Response to Active Preloading
Fluidity is the most noticeable upgrade in this generation of the system. HyperOS 4 introduces three underlying technological breakthroughs: load precision calculation, memory preloading, and a lightweight application runtime environment. These optimize scheduling, memory, and execution simultaneously. Starting with load precision calculation, previous system scheduling was more like "feeling an elephant in the dark," only using surface-level data like CPU usage to judge the load. However, dynamic frequency scaling for power saving causes the actual computing power at the same usage rate to vary wildly. HyperOS 4 goes directly to the bottom layer, using "instruction execution count" as the scheduling basis, akin to taking a high-definition X-ray before surgery to accurately determine the system's real workload. This mechanism covers 168 daily scenarios, from unlocking and starting the camera to swiping the desktop, eliminating redundant execution steps one by one. Official data shows a 25% improvement in unlock speed, a 26% boost in camera cold start speed, and a 28% increase in application scrolling smoothness.
Next is memory preloading. Past memory management involved "allocating memory on the fly when opening an app," inevitably leading to stuttering and latency. HyperOS 4 learns user habits and pre-allocates a "memory pool" for frequently used apps in advance. When an app exits, it automatically organizes memory fragments to ensure sufficient resources for the next start. Official data indicates that after 8 hours of daily use, the system's available memory increases by 27%, maintaining smoothness even with long-term use.
The lightweight application runtime environment targets a long-standing pain point of the Android system. Traditional Android treats all applications equally, meaning even reading a single message or loading a widget requires starting the full runtime framework, with a single process occupying 10-20MB of memory. After booting, the phone often has hundreds of background processes running, accumulating into a massive resource overhead. Xiaomi has developed a proprietary lightweight runtime environment where the foreground UI executes in full machine code for performance, while background services are enabled on demand without loading the full framework. System applications like the desktop and photo album have been migrated, resulting in a 90% reduction in time for scanning tens of thousands of photos and a 32% reduction in memory usage.
In actual daily use, this generation's system is indeed smoother and more responsive than its predecessor. Continuously switching between over a dozen common apps rarely results in cold-start reloads, and frame drops and heating are noticeably reduced. Official data shows that after simulating 9 hours of heavy use, the total startup time for the top 30 popular applications is shortened by 28%. The smooth experience in daily scenarios is solid enough. While the fluidity optimization of the previous two generations was more about "filling gaps," this generation represents a shift from "passive response" to "active prediction." On the core front of fluidity, HyperOS 4 delivers a sufficiently robust result.
AI Breakthrough: From "Understanding Words" to "Getting Things Done"
If design and fluidity are about "filling gaps and catching up with the mainstream," then Super XiaoAI 2.0 is the most groundbreaking upgrade of this generation and the core differentiator for HyperOS in the AI race. This year, Xiaomi has successively released its self-developed MiMo series of large models, ranking among the top in the open-source model camp. HyperOS 4 integrates the MiMo model's capabilities with the system's execution power for the first time, officially upgrading Super XiaoAI to version 2.0. It has transformed from a voice assistant that "understands commands" into an intelligent collaborator that "can execute tasks."
The core upgrade is the "Expert Mode." The biggest change is that you no longer need to break down instructions step-by-step; you can simply state your complete need in one sentence, and it will autonomously think, plan steps, call applications, and complete the execution. For example, saying "Find the photos I took by the sea, organize them, and post them on my Moments" will automatically open the photo album, filter images, and jump to the publishing interface. Saying "Summarize all my courier information and list all pickup codes" will automatically extract courier information from text messages and organize the output. The scheduled task feature automates repetitive work. Needs like "Check my email and texts daily and alert me to important content," which previously required manual repetition, can now be set with a single command. The office suite further boosts productivity. A single sentence can generate popular science presentation pages or interactive teaching web pages, supporting 24/7 uninterrupted execution on the cloud.
Cross-device linkage is another major highlight. Between phones, tablets, Windows, and Mac devices, Super XiaoAI's conversations, memories, and tasks seamlessly transfer. Unfinished commands on a phone can be continued on a computer, and task progress on a computer can be viewed anytime on a phone. A unified memory system makes XiaoAI more attuned to personal habits over time, while cross-device execution breaks down device barriers. You can leave your computer behind and ask XiaoAI on your phone to retrieve files from your computer and send them to your current device. Security and privacy protections have also been implemented: app authorization is fully transparent, sensitive operations require a second confirmation, memory data requires fingerprint verification for access, and XiaoAI will not respond to any questions involving personal memory when the device is locked. This security system provides a basic foundation of confidence for "entrusting daily tasks to AI."
Detail Experience: The Real Feel of Proactive Service
Beyond the three core upgrades, this generation also includes many highly practical small features that truly bring the concept of "proactive service" from an idea into the details of daily use. The Super XiaoAI input method is the most surprising individual feature this time. It deeply integrates the power of large models, transforming from a tool for "typing faster" into an assistant for "expressing better." When inputting by voice, it can automatically understand semantics, organize logic, and output structured, fluent text. In chat scenarios, it can generate appropriate reply suggestions based on context. When filling out forms, it can automatically recall related information, reducing repetitive input. For cross-language communication, it can complete translation within the input method without switching to a translation app. In practice, its level of completion is already sufficient to replace the third-party input method I have long used.
"Copy and Go" is another efficiency feature that feels like "it's about time." The system recognizes the copied text content and the current page context, automatically popping up a corresponding shortcut service. Copying a scenic spot name in Xiaohongshu directly opens the navigation app. Receiving a courier text and copying the pickup code directly opens the corresponding mini-program. Copying a flight number and date while planning a trip directly displays flight status information. It turns common operations from "users actively finding functions" into "services actively finding users," greatly reducing operational friction. AI voice notes make recording inspiration more natural. Voice input automatically generates a structured summary. Long-form content supports Q&A interaction, and a mind map can be generated with one click. The recorder function has also been upgraded, with each recording capable of generating professional meeting minutes, complete with a timeline outline for quickly locating discussion content from different periods.
A new unified device center allows for pinning the operations of frequently used devices to the home page. When using two Xiaomi phones, it enables cross-device call answering and verification code viewing. The multitasking system has been upgraded with more intuitive gestures for the side app bar and split-screen windows. The Xiaomi Smart Island, introduced in the previous generation, now allows customization of which apps can appear on the island. The file manager now includes a recycle bin feature for recovering accidentally deleted files. Steps to reset the lock screen password have been added, and security access controls for app data permissions have been further standardized.
Final Thoughts
Three years of technological accumulation have allowed HyperOS 4 to deliver a result worthy of expectations. In design, it has filled the gap in perceived quality, catching up to the level of mainstream Android camp. In fluidity, it has delivered on the promise of "efficiency leap" through three underlying technological breakthroughs. Super XiaoAI 2.0 has achieved a qualitative leap from "understanding words" to "getting things done." Detailed features like the input method and "Copy and Go" genuinely give the system the warmth of proactive service. There is no denying that this generation is a huge improvement over HyperOS 3 with a strong perceived impact. However, we must remain clear-headed. Regarding design, the system-level aesthetic system is now in place, but the adaptation and visual unification of third-party themes will still take time to polish. Regarding fluidity, the data and experience in daily scenarios are impressive, but the stability under extreme loads and over long-term use still requires longer-term verification. Of course, I must also emphasize that the current version is a beta test version, and there is still room for further refinement.
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