Between the OnePlus 12 and OnePlus Open 2, the OnePlus 12 comes out ahead in pixel density and wired charging, while the OnePlus Open 2 wins on ram and antutu. Overall, the OnePlus 12 scores 69.6 and the OnePlus Open 2 scores 74.5 on our Mars Score.
Which should you buy?
The OnePlus Open 2 edges ahead on the Mars Score (69.6 vs 74.5), but the 4.9-point gap is small enough that the right pick comes down to which spec advantages matter to you.
Pick the OnePlus 12 if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. The biggest gaps in its favor are pixel density, wired charging, weight.
Pick the OnePlus Open 2 if the display is what you stare at all day — refresh rate, brightness, or sharpness is where the difference will be most visible. Its strongest claims are ram, antutu, screen size, among others.
Both ship with comparable main camera, refresh rate, 5g support, so those specs don't separate the two — focus on the differences below.
Bottom line: there is no wrong answer here — match the spec advantages to how you actually use the product. The Mars Score parity tells you both are well-rounded; the differences are about trade-offs, not quality.
Why OnePlus 12 wins
- ▲Pixel density — 26.87% more. 510 ppi vs 402 ppi.
- ▲Wired charging — 25.00% more. 100 W vs 80 W.
- ▲Weight — 19.00 g less. 220 vs 239.
Why OnePlus Open 2 wins
- ▲RAM — 33.33% more. 16 GB vs 12 GB.
- ▲AnTuTu — 30.10% more. 2680000 vs 2060000.
- ▲Screen size — 17.30% more. 8.0 " vs 6.82 ".
- ▲Battery capacity — 5.56% more. 5700 mAh vs 5400 mAh.
- ▲Water resistance: IP68 (vs IP65).
Spec comparison
Design
| Spec | OnePlus 12 | OnePlus Open 2 |
|---|---|---|
| Weight | 220 glead | 239 g |
| Thickness | 9.15 mmlead | 11.7 mm |
| Water resistanceⓘ | IP65 | IP68lead |
| Form factor | bar | foldable_booklead |
Display
| Spec | OnePlus 12 | OnePlus Open 2 |
|---|---|---|
| Screen sizeⓘ | 6.82 " | 8.0 "lead |
| Pixel densityⓘ | 510 ppilead | 402 ppi |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 4500 nits | 4500 nits |
Performance
Cameras
| Spec | OnePlus 12 | OnePlus Open 2 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | OnePlus 12 | OnePlus Open 2 |
|---|---|---|
| Battery capacity | 5400 mAh | 5700 mAhlead |
| Wired chargingⓘ | 100 Wlead | 80 W |
| Wireless chargingⓘ | 50 W | 50 W |
Connectivity
| Spec | OnePlus 12 | OnePlus Open 2 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | OnePlus 12 | OnePlus Open 2 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 4 years | 4 years |
Frequently asked
Which has better battery, OnePlus 12 or OnePlus Open 2?+
OnePlus Open 2 has 5.6% more battery — 5400 mAh vs 5700 mAh.
Which is lighter, OnePlus 12 or OnePlus Open 2?+
OnePlus 12 is 19g lighter — 220g vs 239g.
Is OnePlus 12 waterproof?+
OnePlus 12 has an IP65 rating.
Does OnePlus Open 2 support 5G?+
Yes, OnePlus Open 2 supports 5G.
Which has more RAM, OnePlus 12 or OnePlus Open 2?+
OnePlus Open 2 offers 16GB of RAM.
Which has a better camera, OnePlus 12 or OnePlus Open 2?+
OnePlus Open 2 has a 50 MP main camera vs 50 MP.
Spec-level deep dives
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