Redmi A3X vs Redmi K90
The Redmi A3X (2025) runs on the MediaTek Helio G36, while the Redmi K90 (2025) runs on the Qualcomm Snapdragon 8 Elite; launch prices were $80 and $401. By overall MobileRank rating, the Redmi K90 leads — 76/100 vs 21/100 (a 55-point difference). Key differences: the Redmi K90 has the bigger battery (7100 mAh vs 5000); the main camera is 8 MP vs 50 MP; the Redmi K90 is faster in AnTuTu (3,077,585 vs 193,858); the Redmi K90 has NFC for contactless payments, the Redmi A3X doesn't.
Profile comparison
Category scores
Redmi A3X
Redmi K90
What makes Redmi A3X better?
- Lighter: 192g vs 206g
- Cheaper at launch: $80 vs $401
- Better portability (61/100 vs 55/100)
What makes Redmi K90 better?
- Higher AnTuTu: 3077585 vs 193858
- Better Geekbench Single: 3013 vs 189
- Better Geekbench Multi: 9287 vs 781
- Bigger battery: 7100 vs 5000 mAh
- Faster charging: 100W vs 10W
- Better main camera: 50MP vs 8MP
- Higher refresh rate: 120Hz vs 60Hz
- Higher performance (91/100 vs 11/100)
- Better camera (58/100 vs 10/100)
- Longer battery life (72/100 vs 43/100)
- Better display (82/100 vs 32/100)
Comparison verdict
Comparing the Redmi A3X vs the Redmi K90, the Redmi K90 scores 55 points higher (76/100 vs 21/100). In the "performance" category, the Redmi K90 leads (91/100 vs 11/100). In the "camera" category, the Redmi K90 leads (58/100 vs 10/100). In the "battery" category, the Redmi K90 leads (72/100 vs 43/100). Value score: Redmi A3X — 38/100, Redmi K90 — 80/100; 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 Redmi K90 significantly outperforms the Redmi A3X (91/100 vs 11/100). In the "display" category, the Redmi K90 significantly outperforms the Redmi A3X (82/100 vs 32/100). In the "camera" category, the Redmi K90 significantly outperforms the Redmi A3X (58/100 vs 10/100). In the "battery" category, the Redmi K90 notably outperforms the Redmi A3X (72/100 vs 43/100). In the "portability" category, the Redmi A3X is a bit better (61/100 vs 55/100).
Specs comparison
| Specification | Redmi A3X | Redmi K90 | |
|---|---|---|---|
| Processor | MediaTek Helio G36 | Qualcomm Snapdragon 8 Elite | |
| AnTuTu | 193858 | 3077585 | |
| Geekbench Single | 189 | 3013 | |
| Geekbench Multi | 781 | 9287 | |
| Display | 6.7" IPS LCD | 6.6" AMOLED | |
| Resolution | 720x1650 | 2510x1156 | |
| Refresh rate | 60 Hz | 120 Hz | |
| Battery | 5000 mAh | 7100 mAh | |
| Charging | 10W | 100W | |
| Main camera | 8 MP | 50 MP | |
| Ultrawide | 0 MP | 8 MP | |
| Telephoto | 0 MP | 50 MP | |
| Front camera | 5 MP | 20 MP | |
| RAM | 2GB / 3GB | 12GB / 16GB | |
| Storage | 32GB / 64GB | 256GB / 512GB | |
| OS | Android 14, up to 2 major Android upgrades, MIUI | Android 16 | |
| Brightness (peak) | 500 nits | 3500 nits | |
| NFC | no | yes | |
| Protection | — | IP68 | |
| Dimensions | 168.4×76.3×8.3 mm | 157.5×75.3×8.0 mm | |
| Weight | 192 g | 206 g | |
| Launch price | $80 | $401 |
Camera comparison
Redmi A3X
- Main: 8MP
- Front: 5MP
Redmi K90
- Main: 50MP f/1.9
- Ultrawide: 8MP
- Telephoto: 50MP
- Front: 20MP
Display comparison
Redmi A3X
- 6.7" IPS LCD
- Resolution: 720x1650
- Refresh rate: 60 Hz
Redmi K90
- 6.6" AMOLED
- Resolution: 2510x1156
- Refresh rate: 120 Hz
Battery and charging
Redmi A3X
- 5000 mAh
- Wired: 10W
- No wireless charging
Redmi K90
- 7100 mAh
- Wired: 100W
- No wireless charging
Overall performance score
We compared Redmi A3X and Redmi K90, covering their specs and all relevant benchmarks.
Redmi K90 leads Redmi A3X by 93.7% in our overall performance rating.
Benchmarks
Launch prices and where to check today's
Launch price difference: $321. Redmi A3X was $321 cheaper at launch.
Detailed category analysis
performance
In the "performance" category, the Redmi K90 significantly outperforms the Redmi A3X (91/100 vs 11/100).
display
In the "display" category, the Redmi K90 significantly outperforms the Redmi A3X (82/100 vs 32/100).
camera
In the "camera" category, the Redmi K90 significantly outperforms the Redmi A3X (58/100 vs 10/100).
battery
In the "battery" category, the Redmi K90 notably outperforms the Redmi A3X (72/100 vs 43/100).
portability
In the "portability" category, the Redmi A3X is a bit better (61/100 vs 55/100).
Frequently asked questions
Which is better: the Redmi A3X or the Redmi K90?
The Redmi K90 significantly outperforms the Redmi A3X by 55 points (76/100 vs 21/100).
What is the rating of the Redmi A3X and the Redmi K90?
The Redmi A3X has a MobileRank rating of 21/100, the Redmi K90 — 76/100.
Which has the better camera: the Redmi A3X or the Redmi K90?
The Redmi K90 leads on camera score (58/100 vs 10/100).
Which is more powerful: the Redmi A3X or the Redmi K90?
The Redmi K90 leads on performance (91/100 vs 11/100).
Should you choose the Redmi A3X over the Redmi K90?
The Redmi K90 is a better fit for gamers and power users, budget-conscious buyers.