Oppo K12x 5G vs Xiaomi 14 Ultra
Compare Oppo K12x 5G vs Xiaomi 14 Ultra side by side: MediaTek Dimensity 6300 vs Qualcomm Snapdragon 8 Gen 3, 32MP vs 50MP camera, 5100mAh vs 5000mAh battery…
Oppo
Oppo K12x 5G
$159
3categories won
Xiaomi
14 Ultra
$1,299
15categories won
2 categories tied · 20 scored in total · add a third phone
Which one wins?
Xiaomi 14 Ultra takes the overall win
The Xiaomi 14 Ultra proves superior overall against the Oppo K12x 5G, outperforming on gaming and photography. In camera testing, the 14 Ultra leads with superior optics, while battery endurance leans towards the 14 Ultra. Choose the 14 Ultra if you want the highest performance ceiling, or opt for the Oppo K12x 5G if its lower retail price better fit your budget.
14 Ultra takes battery honors offering 5,000 mAh alongside 90W charging.
14 Ultra provides greater sustained gaming output with its Qualcomm Snapdragon 8 Gen 3 and 16GB RAM.
14 Ultra takes photography with 50MP optics and 5x optical telephoto capabilities.
Oppo K12x 5G provides a sharper value proposition, coming in at $159 vs $1299.
Category verdicts are computed algorithmically from verified technical specifications and hardware benchmarks. Rows where neither figure is objectively better — screen size preference, operating system choice, aesthetic build materials — are displayed for direct reference without scoring bias.
Oppo K12x 5G vs 14 Ultra: specifications compared
Display
| Specification | Oppo K12x 5G | 14 Ultra |
|---|---|---|
| Screen size | 6.67" | 6.73" |
| Resolution | 720 x 1604 | 1440 x 3200Winner |
| Pixel density | 264 ppi | 522 ppiWinner |
| Refresh rate | 120 Hz | 120 Hz |
| Peak brightness | 1000 nits | 3000 nitsWinner |
Performance
| Specification | Oppo K12x 5G | 14 Ultra |
|---|---|---|
| Chipset | MediaTek Dimensity 6300 | Qualcomm Snapdragon 8 Gen 3 |
| Process node | 6 nm | 4 nmWinner |
| AnTuTu score | 430,000 | 2,050,000Winner |
| Geekbench multi | 2060 | 6980Winner |
| Maximum RAM | 8 GB | 16 GBWinner |
| Maximum storage | 256GB | 1TBWinner |
Camera
| Specification | Oppo K12x 5G | 14 Ultra |
|---|---|---|
| Main sensor | 32 MP | 50 MPWinner |
| Rear cameras | 2 | 4Winner |
| Optical zoom | — | 5x |
| Ultrawide | — | 50 MP |
| Selfie camera | 8 MP | 32 MPWinner |
| Max video | 1080p@30fps | 8K at 30fps, 4K at 120fps Dolby Vision |
Battery and charging
| Specification | Oppo K12x 5G | 14 Ultra |
|---|---|---|
| Capacity | 5,100 mAh | 5,000 mAh |
| Wired charging | 45 W | 90 WWinner |
| Wireless charging | No | 80 WWinner |
Design
| Specification | Oppo K12x 5G | 14 Ultra |
|---|---|---|
| Weight | 186 gWinner | 220 g |
| Thickness | 7.68 mmWinner | 9.2 mm |
| Water resistance | IP54 / MIL-STD-810H | IP68 |
| Build | 360-degree Damage-Proof Armour Body, matte composite back, Panda Glass front | High-strength aluminum unibody, nano-tech vegan leather back |
Software and support
| Specification | Oppo K12x 5G | 14 Ultra |
|---|---|---|
| Operating system | Android 14 | Android 14 |
| OS updates | 2 years | 4 yearsWinner |
| Security updates | 3 years | 5 yearsWinner |
Connectivity and value
| Specification | Oppo K12x 5G | 14 Ultra |
|---|---|---|
| 5G | Yes | Yes |
| Wi-Fi | Wi-Fi 5 (802.11ac) | Wi-Fi 7 (802.11be) |
| Storage expansion | microSD | None |
| 3.5mm jack | No | No |
| Launch price | $159Winner | $1,299 |
Oppo K12x 5G
The Oppo K12x 5G brings military-grade MIL-STD-810H shock resistance to the sub-$160 5G segment. Featuring an ultra-slim 7.68mm 360-degree Damage-Proof Armour Body, 45W SuperVOOC fast charging, 1,000 nits 120Hz display, and Splash Touch usability.
- Display
- 6.67"
- Chipset
- MediaTek Dimensity 6300
- Main camera
- 32MP
- Battery
- 5,100mAh
Xiaomi 14 Ultra
With its Sony LYT-900 1-inch main sensor featuring stepless variable aperture from f/1.63 to f/4.0, dual periscope/telephoto lenses, 90W fast charging, and optional Leica Photography Kit, the 14 Ultra is a pure photographer’s camera.
- Display
- 6.73"
- Chipset
- Qualcomm Snapdragon 8 Gen 3
- Main camera
- 50MP
- Battery
- 5,000mAh