OnePlus 12 vs Xiaomi 15 Ultra
The OnePlus 12 (2024) runs on the Qualcomm Snapdragon 8 Gen 3, while the Xiaomi 15 Ultra (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $799 and $999. By overall MobileRank rating, the Xiaomi 15 Ultra leads — 85/100 vs 80/100 (a 5-point difference). Key differences: the Xiaomi 15 Ultra has the bigger battery (6000 mAh vs 5400); the Xiaomi 15 Ultra is faster in AnTuTu (3,030,376 vs 2,401,788).
OnePlus 12
Xiaomi 15 Ultra
- Faster charging: 100W vs 90W
- Lighter: 220g vs 225g
- Cheaper at launch: $799 vs $999
- Better portability (35/100 vs 29/100)
- Higher AnTuTu: 3030376 vs 2401788
- Better Geekbench Single: 3050 vs 2200
- Better Geekbench Multi: 10200 vs 7100
- Bigger battery: 6000 vs 5400 mAh
- Higher performance (92/100 vs 83/100)
- Better camera (87/100 vs 83/100)
- Better display (90/100 vs 89/100)
Comparing the OnePlus 12 vs the Xiaomi 15 Ultra, the Xiaomi 15 Ultra scores 5 points higher (85/100 vs 80/100). Value score: OnePlus 12 — 72/100, Xiaomi 15 Ultra — 82/100; it is biased by price level, so it should not be compared directly between devices at different prices. In the "performance" category, the Xiaomi 15 Ultra is a bit better (92/100 vs 83/100). In the "display" category, the Xiaomi 15 Ultra and the OnePlus 12 are nearly equal (90/100 vs 89/100). In the "camera" category, the Xiaomi 15 Ultra and the OnePlus 12 are nearly equal (87/100 vs 83/100). In the "battery" category, both devices are on the same level — 80/100. In the "portability" category, the OnePlus 12 is a bit better (35/100 vs 29/100).
| Specification | OnePlus 12 | Xiaomi 15 Ultra | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Gen 3 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 2401788 | 3030376 | |
| Geekbench Single | 2200 | 3050 | |
| Geekbench Multi | 7100 | 10200 | |
| Display | 6.8" LTPO AMOLED | 6.7" LTPO AMOLED | |
| Resolution | 3168x1440 | 3200x1440 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 5400 mAh | 6000 mAh | |
| Charging | 100W | 90W | |
| Wireless charging | 50W | 50W | |
| DXOMark (camera) | — | 159 | |
| Main camera | 50 MP | 50 MP | |
| Ultrawide | 48 MP | 50 MP | |
| Telephoto | 64 MP | 50 MP | |
| Front camera | 32 MP | 32 MP | |
| RAM | 12GB / 16GB | 16GB | |
| Storage | 256GB / 512GB | 256GB / 512GB / 1TB | |
| OS | Android 14 / OxygenOS 14 | Android 15 / HyperOS 2 | |
| Brightness (peak) | 4500 nits | 3200 nits | |
| NFC | yes | yes | |
| Protection | IP65 | IP68 | |
| Dimensions | 164.3×75.8×9.2 mm | 161.3×75.3×9.4 mm | |
| Weight | 220 g | 225 g | |
| Launch price | $799 | $999 |
OnePlus 12
- Main: 50MP f/f/1.6
- Ultrawide: 48MP
- Telephoto: 64MP
- Front: 32MP
Xiaomi 15 Ultra
- Main: 50MP f/f/1.63
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
OnePlus 12
- 6.8" LTPO AMOLED
- Resolution: 3168x1440
- Refresh rate: 120 Hz
Xiaomi 15 Ultra
- 6.7" LTPO AMOLED
- Resolution: 3200x1440
- Refresh rate: 120 Hz
OnePlus 12
- 5400 mAh
- NanoReview test: web browsing 13:10 hrs, total 28:16 hrs
- Wired: 100W
- Wireless: 50W
Xiaomi 15 Ultra
- 6000 mAh
- NanoReview test: web browsing 12:19 hrs, total 30:03 hrs
- Wired: 90W
- Wireless: 50W
We compared OnePlus 12 and Xiaomi 15 Ultra, covering their specs and all relevant benchmarks.
Xiaomi 15 Ultra leads OnePlus 12 by 20.7% in our overall performance rating.
Launch price difference: $200. OnePlus 12 was $200 cheaper at launch.
performance
In the "performance" category, the Xiaomi 15 Ultra is a bit better (92/100 vs 83/100).
display
In the "display" category, the Xiaomi 15 Ultra and the OnePlus 12 are nearly equal (90/100 vs 89/100).
camera
In the "camera" category, the Xiaomi 15 Ultra and the OnePlus 12 are nearly equal (87/100 vs 83/100).
battery
In the "battery" category, both devices are on the same level — 80/100.
portability
In the "portability" category, the OnePlus 12 is a bit better (35/100 vs 29/100).
Which is better: the OnePlus 12 or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra edges out the OnePlus 12 by just 5 points — the two devices are very close in overall level.
What is the rating of the OnePlus 12 and the Xiaomi 15 Ultra?
The OnePlus 12 has a MobileRank rating of 80/100, the Xiaomi 15 Ultra — 85/100.
Which is more powerful: the OnePlus 12 or the Xiaomi 15 Ultra?
The Xiaomi 15 Ultra leads on performance (92/100 vs 83/100).
Should you choose the OnePlus 12 over the Xiaomi 15 Ultra?
The OnePlus 12 is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life. The Xiaomi 15 Ultra is a better fit for gamers and power users, mobile photography enthusiasts, those who care about battery life, budget-conscious buyers.