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Xiaomi Xiaomi 15 Ultra vs Xiaomi Xiaomi 18 Pro

Every spec side by side, from each maker's published figures.

Better figure, where one is clearly better

XiaomiXiaomi 15 UltraXiaomiXiaomi 18 Pro
Overview
ReleasedFebruary 2025September 2026
Display
Screen size6.73″6.4″
Resolution3200 × 14402436 × 1120
Sharpness521 pixels per inch419 pixels per inch
PanelLTPO OLEDOLED
Refresh rate120 Hz120 Hz
Peak brightness3,200 nits4,000 nits
Display typeWQHD+ LTPO AMOLED with 1–120 Hz adaptive refresh, 68 billion colours and DCI-P3; All Around Liquid Display glass curves around the edgesAMOLED; rear 2.7-inch AMOLED screen, 912 × 596, up to 120 Hz
Pixel density522 ppi–
Brightness detail3,200 nits multi-scenario peak brightnessMulti-scenario peak 4,000 nits on both screens; minimum 1 nit
Always-on displayAlways-active Display with 2–80 nits adaptive brightness and refresh as low as 1 HzFull-screen always-on display
Screen protectionXiaomi Shield Glass 2.0; camera surround protected by Corning Gorilla Glass 7iXiaomi Dragon Crystal Glass 3.0
Display featuresDC dimming at high brightness, 1,920 Hz PWM dimming at low brightness, 300 Hz touch sampling, Original Colour PRO, Pro HDR, wet touch, HDR10+, Dolby Vision and TÜV low-blue-light, flicker-free and circadian-friendly certificationsHDR10+, HDR Vivid and Dolby Vision; wet-hand touch; BT.2020 colour gamut; up to 300 Hz main-screen and 120 Hz rear-screen touch sampling; full-brightness single-pulse DC dimming; privacy display
Performance
ChipQualcomm Snapdragon 8 EliteSnapdragon 8 Elite Gen 6
Memory16 GB12 GB – 16 GB
Storage512 GB, 1 TB256 GB, 512 GB, 1 TB
CPUSecond-generation TSMC 3 nm Qualcomm Oryon CPU; two prime cores up to 4.32 GHz and six performance cores up to 3.53 GHzFourth-generation Qualcomm Oryon CPU up to 5 GHz; TSMC 2 nm process; TechRadar confirms the English Snapdragon 8 Elite Gen 6 name for this model
GPUQualcomm Adreno GPU; maker gives no numeric suffixAdreno GPU; maker does not publish a model number
AI engineQualcomm AI engine; maker states 80 TOPS computing powerQualcomm AI Engine
Storage typeLPDDR5X RAM at 8,533 Mbps and UFS 4.1 storage; UK 16 GB/512 GB or 16 GB/1 TBLPDDR5X RAM; UFS 4.1 storage; China launch configuration pairings corroborated by Sina
CoolingXiaomi 3D Dual-Channel IceLoop system with 5,100 mm² overall loop heat-pipe area–
Cameras
Main camera50 MP200 MP
Ultra wide camera50 MP50 MP
Telephoto camera200 MP200 MP
Optical zoom4.3×3.2×
Front camera32 MP50 MP
Main cameraLeica Summilux, Sony LYT-900, 50 MP, f/1.63 fixed aperture, 1-inch sensor, 23 mm equivalent focal length, eight-element lens, 4-axis OIS and 4-in-1 binning to 3.2 µm pixels200 MP Light Hunter 960, 1/1.28-inch sensor, ƒ/1.67, 23 mm equivalent, OIS, QPD autofocus; 16-in-1 2.44 µm pixels; 1G+6P lens
Ultra wide cameraLeica 50 MP, f/2.2, 14 mm equivalent focal length, 115° field of view, six-element lens, 1.28 µm binned pixels and macro focusing from 5 cm50 MP, ƒ/2.4, 17 mm equivalent, 102° field of view, autofocus; 5 cm macro
Telephoto cameraLeica 200 MP periscope, f/2.6, OIS, 100 mm equivalent focal length, 1/1.4-inch sensor and 2.24 µm binned pixels; second floating telephoto is 50 MP, f/1.8, OIS, 70 mm equivalent focal length, 1.4 µm binned pixels and macro focusing from 10 cm200 MP, 1/1.56-inch sensor, ƒ/2.4, OIS; 12 cm telephoto macro
Front cameraOmniVision OV32B, 32 MP, f/2.0, 21 mm equivalent focal length and 90° field of view50 MP
Zoom3× floating telephoto and 4.3× periscope optical ratios identified by Tech Advisor and TechRadar; maker lists 23/70/100 mm focal lengths and up to 120× digital zoom–
Video recording8K at 30 fps; 4K at 30/60/120 fps; Full HD at 30/60 fps; HD at 30 fps; Dolby Vision and 4K60 10-bit log across focal lengths; 4K120 on main/periscope; slow motion HD or Full HD at 120/240/480/960/1,920 fps8K at 30 fps; 4K at 30, 60 or 120 fps; 1080p at 30 or 60 fps; 720p at 30 fps; slow motion 720p at 120, 240, 480, 960 or 1,920 fps and 1080p at 120, 240 or 960 fps
Front video4K or Full HD at 30/60 fps, HD at 30 fps; Dolby Vision video, teleprompter, slow motion selfie and time-lapse selfie4K and 1080p at 30 or 60 fps; 720p at 30 fps
Camera features13-channel multispectral sensor, Leica Authentic and Vibrant styles, Leica filters, ProFocus motion and eye tracking, Lightning Burst, Dynamic Shots, master portraits from 23–135 mm, 50/200 MP modes, macro, Fastshot, Supermoon, RAW/DNG/HEIF/JPEG, 16-bit UltraRAW, Movie mode, ShootSteady, Dual Video and Ultra Night Video; Photography Kit Legend Edition sold separatelyLeica Authentic and Vibrant looks; rear-screen selfies and preview; dynamic photos, subject and audio tracking, portrait, night, Pro, time-lapse, panorama and document modes
Battery and charging
Battery5,410 mAh7,000 mAh
Wired chargingUp to 90 WUp to 100 W
Wireless chargingUp to 80 WUp to 50 W
Battery life detail5,410 mAh typical UK Xiaomi Surge Battery; maker laboratory claim of up to 25 hours video playback; Surge P3 charging and G2 battery-management chips7,000 mAh typical; 6,860 mAh minimum; built-in non-removable battery
Wired charging90 W HyperCharge; QC3+, QC3.0, QC2.0, PD3.0, PD2.0 and MI FC 2.0; separate Xiaomi 90 W adaptor recommended100 W; QC3+, QC3.0, QC2.0, PD3.0, PD2.0 and 100 W PPS supported
Wireless charging80 W wireless HyperCharge; compatible wireless charger sold separately50 W Xiaomi wireless charging
Charges other devices–27 W wired reverse charging; wireless reverse charging also supported
Design
TypeStandardStandard
Weight226 g203 g
Thickness9.35 mm8.46 mm
Height × width161.3 × 75.3 mm151.8 × 72 mm
Water and dust resistanceIP68–
Materials6M42 high-strength aluminium frame; maker confirms Silver Chrome glass fibre and PU leather; Tech Advisor identifies glass-fibre backs on Black/WhiteFibreglass versions are 203 g and 8.46 mm thick; glass Galaxy Blue and transparent versions are 208 g and 8.56 mm thick
ColoursBlack, White and Silver Chrome; main dimensions and weight are for Black/White, while Silver Chrome is 9.48 mm thick and weighs 229 gBlack, White, pink, Galaxy Blue and transparent editions; China-market names
Water resistance detailIP68; maker test in static freshwater at 1.5 m for 30 minutes with temperature difference no greater than 5 K; resistance can decline with wear; separate photography kit system rated IP54–
BiometricsUltrasonic in-display fingerprint reader and AI Face Unlock3D ultrasonic fingerprint sensor
SensorsProximity, ambient light, accelerometer, gyroscope, electronic compass, IR blaster, laser autofocus, barometer and flicker sensor; X-axis linear vibration motorProximity, under-screen and rear ambient light/colour temperature, accelerometer, gyroscope, compass, X-axis linear motor, IR blaster, flicker, laser autofocus, barometer and Hall sensors
SpeakersStereo speakers, Dolby Atmos, Hi-Res Audio and Hi-Res Wireless AudioStereo dual speakers; Dolby Atmos, spatial audio and Hi-Res wired/wireless audio; USB-C digital headphones
MicrophonesFour-microphone array with directional/omnidirectional recording and Audio Zoom–
Software
Operating systemAndroidAndroid
Software at launchXiaomi HyperOS 2; Android 15 confirmed by Tech Advisor and TechRadarXiaomi HyperOS 4; China variant
Software updatesFour Android version upgrades and six years of security updates reported at launch by Tech Advisor and TechRadar–
AI featuresRegional HyperAI writing, speech recognition, interpreter, search, dynamic wallpapers, creativity and image-editing tools, Google Gemini and Circle to Search; applicable features require internet access and updates–
In the boxPhone, USB-C cable, SIM tool, protective case, safety information, quick-start guide, warranty card and desiccant; standard UK box excludes adaptorPhone, power adapter, USB-C cable, case, pre-applied screen protector, SIM tool and documentation; contents can vary with sales bundle
Connectivity
Mobile network5G SA/NSA, LTE, UMTS and GSM; 4×4 MIMO; Xiaomi Surge T1/T1S tuners and antenna array5G n1/2/3/5/7/8/12/18/20/25/26/28/38/40/41/48/66/77/78/79/80/81/83/84/89; LTE FDD B1/2/3/4/5/7/8/12/17/18/19/20/25/26/28/66 and TDD B34/38/39/40/41/42/43/48; 4×4 MIMO; China carrier and software restrictions apply
SIMDual nano-SIM, nano-SIM plus eSIM or dual eSIM; eSIM depends on region and carrierDual nano-SIM; dual-active operation depends on SA bands and carrier support
Wi-FiWi-Fi 7/6E/6 capability depends on region and network; dual-band simultaneous operation, 2×2 MIMO, 8×8 sounding for MU-MIMO, Wi-Fi Direct and MiracastWi-Fi 7, enhanced Wi-Fi 6, Wi-Fi 5, Wi-Fi 4 and 802.11a/b/g; 2.4 and 5 GHz; 2×2 MIMO, MLO, 8×8 sounding, Wi-Fi Direct and Miracast
BluetoothBluetooth 6.0, Dual-Bluetooth; SBC, AAC, aptX, aptX HD, aptX Adaptive, LDAC, LHDC 5.0 and LC3Bluetooth 6.0; dual Bluetooth; SBC, AAC, aptX, aptX HD, aptX Adaptive, LDAC, LHDC 5.0, LC3 and MIHC
NFCSupportedChinese Wallet transport, access-card and payment functions; service availability depends on location and provider
USBUSB-C, USB 3.2 Gen 2USB-C, USB 3.2 Gen 1; a separate USB 3 cable is required because the supplied cable does not support USB 3 transfers
PositioningGPS L1/L5, Galileo E1/E5a, GLONASS G1, BeiDou, QZSS L1/L5 and NavIC L5; assisted positioningGPS L1/L5, BeiDou B1I/B1C/B2a, Galileo E1/E5a, GLONASS G1, QZSS L1/L5, NavIC L5; A-GNSS and assisted network positioning

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