Between the Galaxy S26 Ultra and OnePlus Open 2, the Galaxy S26 Ultra comes out ahead in main camera and pixel density, while the OnePlus Open 2 wins on wireless charging and front camera. Overall, the Galaxy S26 Ultra scores 75.6 and the OnePlus Open 2 scores 74.5 on our Mars Score.
Which should you buy?
These two are nearly even on the Mars Score (75.6 vs 74.5). The decision isn't about overall quality — both clear the bar — it's about which specific trade-offs fit your use.
Pick the Galaxy S26 Ultra if you photograph or shoot video regularly and want the better imaging pipeline of the two. The biggest gaps in its favor are main camera, pixel density, weight, among others.
Pick the OnePlus Open 2 if you photograph or shoot video regularly and want the better imaging pipeline of the two. Its strongest claims are wireless charging, front camera, wired charging, among others.
Both ship with comparable ram, 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 Samsung - Galaxy S26 Ultra wins
- ▲Main camera — 300.00% more. 200 MP vs 50 MP.
- ▲Pixel density — 24.63% more. 501 ppi vs 402 ppi.
- ▲Weight — 7.00 g less. 232 vs 239.
- ▲Promised OS updates: 7 (vs 4).
Why OnePlus Open 2 wins
- ▲Wireless charging — 233.33% more. 50 W vs 15 W.
- ▲Front camera — 166.67% more. 32 MP vs 12 MP.
- ▲Wired charging — 23.08% more. 80 W vs 65 W.
- ▲AnTuTu — 16.02% more. 2680000 vs 2310000.
- ▲Screen size — 15.94% more. 8.0 " vs 6.9 ".
- ▲Battery capacity — 14.00% more. 5700 mAh vs 5000 mAh.
Spec comparison
Design
| Spec | Samsung - Galaxy S26 Ultra | OnePlus Open 2 |
|---|---|---|
| Weight | 232 glead | 239 g |
| Thickness | 8.6 mmlead | 11.7 mm |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | bar | foldable_booklead |
Display
| Spec | Samsung - Galaxy S26 Ultra | OnePlus Open 2 |
|---|---|---|
| Screen sizeⓘ | 6.9 " | 8.0 "lead |
| Pixel densityⓘ | 501 ppilead | 402 ppi |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 2600 nits | 4500 nitslead |
Performance
Cameras
| Spec | Samsung - Galaxy S26 Ultra | OnePlus Open 2 |
|---|---|---|
| Main cameraⓘ | 200 MPlead | 50 MP |
| Front camera | 12 MP | 32 MPlead |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | Samsung - Galaxy S26 Ultra | OnePlus Open 2 |
|---|---|---|
| Battery capacity | 5000 mAh | 5700 mAhlead |
| Wired chargingⓘ | 65 W | 80 Wlead |
| Wireless chargingⓘ | 15 W | 50 Wlead |
Connectivity
| Spec | Samsung - Galaxy S26 Ultra | OnePlus Open 2 |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | Samsung - Galaxy S26 Ultra | OnePlus Open 2 |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 7 yearslead | 4 years |
Frequently asked
Which has better battery, Galaxy S26 Ultra or OnePlus Open 2?+
OnePlus Open 2 has 14.0% more battery — 5000 mAh vs 5700 mAh.
Which is lighter, Galaxy S26 Ultra or OnePlus Open 2?+
Galaxy S26 Ultra is 7g lighter — 232g vs 239g.
Is Galaxy S26 Ultra waterproof?+
Galaxy S26 Ultra has an IP68 rating.
Does OnePlus Open 2 support 5G?+
Yes, OnePlus Open 2 supports 5G.
Which has a better camera, Galaxy S26 Ultra or OnePlus Open 2?+
Galaxy S26 Ultra has a 200 MP main camera vs 50 MP.
Spec-level deep dives
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