Xiaomi 15 Ultra vs OnePlus 12
Head-to-head specifications
| Metric | Xiaomi 15 Ultra | OnePlus 12 | Difference |
|---|---|---|---|
| AnTuTu v10 score | 2,758,993 | 2,087,159 | +32.2% |
| Chipset | Snapdragon 8 Elite | Snapdragon 8 Gen 3 | — |
| Display | 6.7" 120 Hz | 6.8" 120 Hz | — |
| Battery (mAh) | 600 | 5,400 | -88.9% |
| Rear cameras | 50+200+50+50 MP | 50+64+48 MP | — |
| Front camera (MP) | 32 | 32 | — |
| RAM / storage (base) | 12 GB / 256 GB | 12 GB / 256 GB | — |
| Max configuration | 16 GB / 1024 GB | 24 GB / 1024 GB | — |
| Weight (g) | 225 | 220 | +2.3% |
| Connectivity / unlock | 5G · Under-display | 5G · Under-display | — |
| Launch price (USD) | $1,299–$1,549 | $799–$1,099 | +62.6% |
- Xiaomi 15 Ultra leads on raw performance by about 32% on AnTuTu v10 (Snapdragon 8 Elite vs Snapdragon 8 Gen 3).
- OnePlus 12 is the cheaper option at launch pricing.
Verdict: Xiaomi 15 Ultra or OnePlus 12?
Xiaomi 15 Ultra advantages
- Raw performance (+24%)
- Camera resolution (+68%)
OnePlus 12 advantages
- Battery capacity (+89%)
- Affordability (+38%)
Which should you choose?
- Choose the Xiaomi 15 Ultra if you game or want the most headroom for years of updates.
- Choose the OnePlus 12 if you need all-day (or two-day) battery life.
- Choose the Xiaomi 15 Ultra if photography is your priority.
Value for money
OnePlus 12 delivers more performance per dollar, making it the better value of the two at their listed prices.
Xiaomi 15 Ultra vs OnePlus 12: which should you choose?
Xiaomi 15 Ultra — Xiaomi Android 15 smartphone (2025) with a 6.73-inch 120 Hz LTPO AMOLED, Snapdragon 8 Elite, 600 mAh battery and 200MP main camera, scoring about 2,758,993 on AnTuTu v10; launched at $1,299.
OnePlus 12 — OnePlus Android 14 smartphone (2024) with a 6.82-inch 120 Hz LTPO4 AMOLED, Snapdragon 8 Gen 3, 5400 mAh battery and 64MP main camera, scoring about 2,087,159 on AnTuTu v10; launched at $799.
Xiaomi 15 Ultra vs OnePlus 12: Xiaomi 15 Ultra is the faster phone. Xiaomi 15 Ultra leads on raw performance by about 32% on AnTuTu v10 (Snapdragon 8 Elite vs Snapdragon 8 Gen 3). OnePlus 12 is the cheaper option at launch pricing.
Performance and everyday use
The Xiaomi 15 Ultra is the faster device on raw benchmarks (2,758,993 vs 2,087,159 on AnTuTu v10), running the Snapdragon 8 Elite against the Snapdragon 8 Gen 3. For messaging, browsing and social apps both feel instant — the gap matters most for gaming and long-term headroom.
Display and battery
Xiaomi 15 Ultra carries a 6.7-inch 120 Hz LTPO AMOLED against a 6.8-inch 120 Hz LTPO4 AMOLED on the OnePlus 12. Batteries are 600 and 5,400 mAh — though software tuning and chipset efficiency shape real-world endurance as much as capacity.
Cameras, storage and price
Rear arrays are 50+200+50+50 MP versus 50+64+48 MP, with 32 MP and 32 MP front cameras. Base configurations start at 12 GB / 256 GB and 12 GB / 256 GB. The OnePlus 12 is the more affordable at about $799 launch price, which may matter more than a small spec gap.
The verdict
Both are credible choices in the smartphone comparison space; the specification table above lays out every metric so you can weigh the trade-offs that matter to you. Pick the one whose strengths line up with how you will actually use it.
Frequently asked questions
Is the Xiaomi 15 Ultra better than the OnePlus 12?
These two are closely matched — the right pick comes down to which specific strengths you value and the price you actually pay. Xiaomi 15 Ultra leads on raw performance by about 32% on AnTuTu v10 (Snapdragon 8 Elite vs Snapdragon 8 Gen 3).
What is the main difference between the Xiaomi 15 Ultra and the OnePlus 12?
Xiaomi 15 Ultra leads on raw performance by about 32% on AnTuTu v10 (Snapdragon 8 Elite vs Snapdragon 8 Gen 3). OnePlus 12 is the cheaper option at launch pricing.
Which is better value?
OnePlus 12 delivers more performance per dollar, making it the better value of the two at their listed prices.
Which should I choose?
Choose the Xiaomi 15 Ultra if you game or want the most headroom for years of updates. Choose the OnePlus 12 if you need all-day (or two-day) battery life.
Methodology
Smartphones are compared on AnTuTu v10 benchmark scores, chipset, display size and refresh rate, battery capacity, rear and front camera resolution, RAM and storage across launch variants, weight, and launch pricing (USD). Each model shows its base variant with the top-spec configuration noted where multiple variants exist. Benchmark scores reflect the listed chipset variant; real-world battery life and camera quality depend on software tuning, not just hardware numbers.