Between the OnePlus Open 2 and Pixel 9a, the OnePlus Open 2 comes out ahead in wireless charging and wired charging, while the Pixel 9a wins on weight and pixel density. Overall, the OnePlus Open 2 scores 74.5 and the Pixel 9a scores 63.2 on our Mars Score.
Which should you buy?
The OnePlus Open 2 is the clear pick on raw spec strength, leading by 11.3 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.
Pick the OnePlus Open 2 if you photograph or shoot video regularly and want the better imaging pipeline of the two. The biggest gaps in its favor are wireless charging, wired charging, front camera, among others.
Pick the Pixel 9a 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 weight, pixel density, promised os updates.
Both ship with comparable refresh rate, 5g support, water resistance, so those specs don't separate the two — focus on the differences below.
Bottom line: the OnePlus Open 2 is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.
Why OnePlus Open 2 wins
- ▲Wireless charging — 566.67% more. 50 W vs 7.5 W.
- ▲Wired charging — 247.83% more. 80 W vs 23 W.
- ▲Front camera — 146.15% more. 32 MP vs 13 MP.
- ▲AnTuTu — 116.13% more. 2680000 vs 1240000.
- ▲RAM — 100.00% more. 16 GB vs 8 GB.
- ▲Screen size — 26.98% more. 8.0 " vs 6.3 ".
- ▲Battery capacity — 11.76% more. 5700 mAh vs 5100 mAh.
- ▲Main camera — 4.17% more. 50 MP vs 48 MP.
Why Google - Pixel 9a wins
- ▲Weight — 53.00 g less. 186 vs 239.
- ▲Pixel density — 4.98% more. 422 ppi vs 402 ppi.
- ▲Promised OS updates: 7 (vs 4).
Spec comparison
Design
| Spec | OnePlus Open 2 | Google - Pixel 9a |
|---|---|---|
| Weight | 239 g | 186 glead |
| Thickness | 11.7 mm | 8.9 mmlead |
| Water resistanceⓘ | IP68 | IP68 |
| Form factor | foldable_booklead | bar |
Display
| Spec | OnePlus Open 2 | Google - Pixel 9a |
|---|---|---|
| Screen sizeⓘ | 8.0 "lead | 6.3 " |
| Pixel densityⓘ | 402 ppi | 422 ppilead |
| Refresh rateⓘ | 120 Hz | 120 Hz |
| Peak brightnessⓘ | 4500 nitslead | 2700 nits |
Performance
Cameras
| Spec | OnePlus Open 2 | Google - Pixel 9a |
|---|---|---|
| Main cameraⓘ | 50 MPlead | 48 MP |
| Front camera | 32 MPlead | 13 MP |
| Optical image stabilizationⓘ | true | true |
Battery
| Spec | OnePlus Open 2 | Google - Pixel 9a |
|---|---|---|
| Battery capacity | 5700 mAhlead | 5100 mAh |
| Wired chargingⓘ | 80 Wlead | 23 W |
| Wireless chargingⓘ | 50 Wlead | 7.5 W |
Connectivity
| Spec | OnePlus Open 2 | Google - Pixel 9a |
|---|---|---|
| 5G supportⓘ | true | true |
| Headphone jack | false | false |
| microSD slot | false | false |
Operating System
| Spec | OnePlus Open 2 | Google - Pixel 9a |
|---|---|---|
| OS | Android | Android |
| Promised OS updates | 4 years | 7 yearslead |
Frequently asked
Which has better battery, OnePlus Open 2 or Pixel 9a?+
OnePlus Open 2 has 11.8% more battery — 5700 mAh vs 5100 mAh.
Which is lighter, OnePlus Open 2 or Pixel 9a?+
Pixel 9a is 53g lighter — 239g vs 186g.
Is OnePlus Open 2 waterproof?+
OnePlus Open 2 has an IP68 rating.
Does Pixel 9a support 5G?+
Yes, Pixel 9a supports 5G.
Which has more RAM, OnePlus Open 2 or Pixel 9a?+
OnePlus Open 2 offers 16GB of RAM.
Which has a better camera, OnePlus Open 2 or Pixel 9a?+
OnePlus Open 2 has a 50 MP main camera vs 48 MP.
Spec-level deep dives
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