Where they actually differ
The most decisive specs, ranked by how much they matter — before the full spec table.
| Spec | OnePlus 13 | OnePlus Open 2 |
|---|---|---|
| Weight | 210 g | 239 g |
| Pixel density | 510 ppi | 402 ppi |
| Wired charging | 100 W | 80 W |
| Screen size | 6.82 " | 8.0 " |
| Battery capacity | 6000 mAh | 5700 mAh |
| AnTuTu | 2640000 | 2680000 |
Between the OnePlus 13 and OnePlus Open 2, the OnePlus 13 comes out ahead in weight / pixel density, while the OnePlus Open 2 wins on screen size / antutu. Overall, the OnePlus 13 scores 72.3 and the OnePlus Open 2 scores 71.8 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (72.3 vs 71.8). The decision is not about overall quality — both clear the bar — it is about which specific trade-offs fit your use.
Pick the OnePlus 13 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 weight, pixel density, wired charging, among others. The single most decisive one: Weight — 29.00 g less. 210 vs 239.
Pick the OnePlus Open 2 if you care most about screen size / antutu. Its strongest claims are screen size, antutu. The single most decisive one: Screen size — 17.30% more. 8.0 " vs 6.82 ".
Both ship with comparable ram, main camera, refresh rate, so those specs do not 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 says both are well-rounded; the differences are about trade-offs, not quality.
Which should you buy: OnePlus 13 or OnePlus Open 2?
OnePlus 13 leads the current Mars Score by 0.5 points.The more useful decision is the trade-off behind that result: compare screen size, pixel density, battery capacity against the way you will actually use the product.
Choose OnePlus 13 if…
OnePlus 13 has the measurable edge on weight g, pixel density ppi, wired charging w.
Choose OnePlus Open 2 if…
OnePlus Open 2 has the measurable edge on screen size in, antutu score.
This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.
Why OnePlus 13 wins
- ▲Weight — 29.00 g less. 210 vs 239.
- ▲Pixel density — 26.87% more. 510 ppi vs 402 ppi.
- ▲Wired charging — 25.00% more. 100 W vs 80 W.
- ▲Battery capacity — 5.26% more. 6000 mAh vs 5700 mAh.
- ▲Water resistance: IP69 (vs IP68).
Why OnePlus Open 2 wins
- ▲Screen size — 17.30% more. 8.0 " vs 6.82 ".
- ▲AnTuTu — 1.52% more. 2680000 vs 2640000.
Spec comparison
Design
| Spec | OnePlus 13 | OnePlus Open 2 |
|---|---|---|
| Weight | 210 glead | 239 g |
| Thickness | 8.5 mmlead | 11.7 mm |
| Water resistanceⓘ | IP69lead | IP68 |
| Form factor | bar | foldable_booklead |
Display
| Spec | OnePlus 13 | 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
| Spec | OnePlus 13 | OnePlus Open 2 |
|---|---|---|
| RAMⓘ | 16 GB | 16 GB |
| Storageⓘ | 512 GB | 512 GB |
| AnTuTuⓘ | 2640000 | 2680000lead |
| CPU total clockⓘ | 22.8 GHz | 22.8 GHz |
Cameras
| Spec | OnePlus 13 | OnePlus Open 2 |
|---|---|---|
| Main cameraⓘ | 50 MP | 50 MP |
| Front camera | 32 MP | 32 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | OnePlus 13 | OnePlus Open 2 |
|---|---|---|
| Battery capacityⓘ | 6000 mAhlead | 5700 mAh |
| Wired chargingⓘ | 100 Wlead | 80 W |
| Wireless chargingⓘ | 50 W | 50 W |
Connectivity
| Spec | OnePlus 13 | OnePlus Open 2 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | OnePlus 13 | OnePlus Open 2 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 4 years | 4 years |
Frequently asked
Which has better battery, OnePlus 13 or OnePlus Open 2?+
OnePlus 13 has 5.3% more battery — 6000 mAh vs 5700 mAh.
Which is lighter, OnePlus 13 or OnePlus Open 2?+
OnePlus 13 is 29g lighter — 210g vs 239g.
Is OnePlus 13 waterproof?+
OnePlus 13 has an IP69 rating.
Does OnePlus Open 2 support 5G?+
Yes, OnePlus Open 2 supports 5G.
Which has a better camera, OnePlus 13 or OnePlus Open 2?+
OnePlus Open 2 has a 50 MP main camera vs 50 MP.