OnePlus 15 vs Redmi K40
The OnePlus 15 (2025) runs on the Qualcomm Snapdragon 8 Elite Gen 5, while the Redmi K40 (2021) runs on the Qualcomm Snapdragon 870; launch prices were $799 and $309. By overall MobileRank rating, the OnePlus 15 leads — 86/100 vs 54/100 (a 32-point difference). Key differences: the OnePlus 15 has the bigger battery (6500 mAh vs 4520); the main camera is 50 MP vs 48 MP; the OnePlus 15 is faster in AnTuTu (3,606,149 vs 1,010,069); the Redmi K40 is noticeably lighter (196g vs 213g).
Profile comparison
Category scores
OnePlus 15
Redmi K40
What makes OnePlus 15 better?
- Higher AnTuTu: 3606149 vs 1010069
- Better Geekbench Single: 3639 vs 1298
- Better Geekbench Multi: 11047 vs 3520
- Bigger battery: 6500 vs 4520 mAh
- Faster charging: 120W vs 33W
- Better main camera: 50MP vs 48MP
- Higher performance (97/100 vs 61/100)
- Better camera (78/100 vs 36/100)
- Longer battery life (89/100 vs 42/100)
- Better display (84/100 vs 79/100)
What makes Redmi K40 better?
- Lighter: 196g vs 213g
- Cheaper at launch: $309 vs $799
- Better portability (64/100 vs 50/100)
Comparison verdict
Comparing the OnePlus 15 vs the Redmi K40, the OnePlus 15 scores 32 points higher (86/100 vs 54/100). In the "performance" category, the OnePlus 15 leads (97/100 vs 61/100). In the "camera" category, the OnePlus 15 leads (78/100 vs 36/100). In the "battery" category, the OnePlus 15 leads (89/100 vs 42/100). Value score: OnePlus 15 — 86/100, Redmi K40 — 46/100; it shows how far a model sits above or below the usual level for its price, and is not part of the overall rating. In the "performance" category, the OnePlus 15 significantly outperforms the Redmi K40 (97/100 vs 61/100). In the "display" category, the OnePlus 15 is a bit better (84/100 vs 79/100). In the "camera" category, the OnePlus 15 significantly outperforms the Redmi K40 (78/100 vs 36/100). In the "battery" category, the OnePlus 15 significantly outperforms the Redmi K40 (89/100 vs 42/100). In the "portability" category, the Redmi K40 is a bit better (64/100 vs 50/100).
Specs comparison
| Specification | OnePlus 15 | Redmi K40 | |
|---|---|---|---|
| Processor | Qualcomm Snapdragon 8 Elite Gen 5 | Qualcomm Snapdragon 870 | |
| AnTuTu | 3606149 | 1010069 | |
| Geekbench Single | 3639 | 1298 | |
| Geekbench Multi | 11047 | 3520 | |
| Display | 6.8" AMOLED | 6.7" AMOLED | |
| Resolution | 1272x2772 | 2400x1080 | |
| Refresh rate | 120 Hz | 120 Hz | |
| Battery | 6500 mAh | 4520 mAh | |
| Charging | 120W | 33W | |
| Wireless charging | 50W | — | |
| Main camera | 50 MP | 48 MP | |
| Ultrawide | 50 MP | 8 MP | |
| Telephoto | 50 MP | 0 MP | |
| Front camera | 32 MP | 20 MP | |
| RAM | 12GB / 16GB | 6GB / 8GB / 12GB | |
| Storage | 256GB / 512GB | 128GB / 256GB | |
| OS | Android 16, OxygenOS 16 (Global), ColorOS 16 (China) | Android 11 | |
| Brightness (peak) | 1800 nits | 1300 nits | |
| NFC | yes | yes | |
| Protection | IP68 | — | |
| Dimensions | 161.4×76.7×8.1 mm | 163.7×76.4×7.8 mm | |
| Weight | 213 g | 196 g | |
| Launch price | $799 | $309 |
Camera comparison
OnePlus 15
- Main: 50MP f/1.8
- Ultrawide: 50MP
- Telephoto: 50MP
- Front: 32MP
Redmi K40
- Main: 48MP f/1.79
- Ultrawide: 8MP
- Front: 20MP
Display comparison
OnePlus 15
- 6.8" AMOLED
- Resolution: 1272x2772
- Refresh rate: 120 Hz
Redmi K40
- 6.7" AMOLED
- Resolution: 2400x1080
- Refresh rate: 120 Hz
Battery and charging
OnePlus 15
- 6500 mAh
- Wired: 120W
- Wireless: 50W
Redmi K40
- 4520 mAh
- Wired: 33W
- Wireless charging: no data
Overall performance score
We compared OnePlus 15 and Redmi K40, covering their specs and all relevant benchmarks.
OnePlus 15 leads Redmi K40 by 257.0% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $490. Redmi K40 was $490 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the OnePlus 15 significantly outperforms the Redmi K40 (97/100 vs 61/100).
display
In the "display" category, the OnePlus 15 is a bit better (84/100 vs 79/100).
camera
In the "camera" category, the OnePlus 15 significantly outperforms the Redmi K40 (78/100 vs 36/100).
battery
In the "battery" category, the OnePlus 15 significantly outperforms the Redmi K40 (89/100 vs 42/100).
portability
In the "portability" category, the Redmi K40 is a bit better (64/100 vs 50/100).
Frequently asked questions
Which is better: the OnePlus 15 or the Redmi K40?
The OnePlus 15 significantly outperforms the Redmi K40 by 32 points (86/100 vs 54/100).
What is the rating of the OnePlus 15 and the Redmi K40?
The OnePlus 15 has a MobileRank rating of 86/100, the Redmi K40 — 54/100.
Which has the better camera: the OnePlus 15 or the Redmi K40?
The OnePlus 15 leads on camera score (78/100 vs 36/100).
Which is more powerful: the OnePlus 15 or the Redmi K40?
The OnePlus 15 leads on performance (97/100 vs 61/100).
Should you choose the OnePlus 15 over the Redmi K40?
The OnePlus 15 is a better fit for gamers and power users, those who care about battery life, budget-conscious buyers. The Redmi K40 is a better fit for active users.