PhoneLifespan

ROG Phone 9 Pro vs Open

vs

Winner

Asus ROG Phone 9 Pro

Lifespan decides this one: the ROG Phone 9 Pro is supported until Nov 2029 at $24.24 per month of safe use, while the Open runs out in Oct 2028 ($31.90/month). On a which-lasts-longer question, that's not a tie — it's the whole answer.

Value Score: ROG Phone 9 Pro 60 · Open 57 — methodology

The lifespan decider

When specs are close, support length decides it — this is what each phone costs per month of safe use.

Asus ROG Phone 9 Pro $1000
Safe to buy$24.24/mo
2024◆ Buy-by Nov 20272029
OnePlus Open $900
Buy with care$31.90/mo
2023◆ Buy-by Oct 20262028

Category by category

Display
ROG Phone 9 Pro 60Open 90

The Open's screen is the better one — 7.82-inch 2k ltpo3 fluid amoled inner foldable (2440×2268, 426 ppi) + 6.31-inch 2k amoled cover (2484×1116, 431 ppi), both 120hz, up to 2800 nits peak.

Performance
ROG Phone 9 Pro 98Open 85

The ROG Phone 9 Pro's Snapdragon 8 Elite is simply the faster chip.

Camera
ROG Phone 9 Pro 79Open 79

Camera systems are comparable on paper — pick by sample photos.

Battery
ROG Phone 9 Pro 96Open 76

5,800mAh vs 4,805mAh — the ROG Phone 9 Pro lasts longer between charges.

Software longevity
ROG Phone 9 Pro 49Open 34

The ROG Phone 9 Pro is supported until Nov 2029 — 13 months longer than the Open.

Value
ROG Phone 9 Pro 60Open 57

Pound for pound, these two are equally good deals.

Full spec table
SpecROG Phone 9 ProOpen
Price (street)$1000$900
Display6.78-inch flexible LTPO AMOLED, FHD+ (1080×2400), 1–185Hz, 2500-nit peak7.82-inch 2K LTPO3 Fluid AMOLED inner foldable (2440×2268, 426 ppi) + 6.31-inch 2K AMOLED cover (2484×1116, 431 ppi), both 120Hz, up to 2800 nits peak
ChipsetSnapdragon 8 EliteSnapdragon 8 Gen 2
RAM16GB/24GB16GB
Storage512GB/1TB512GB
Battery5,800 mAh4,805 mAh
Charging65W wired (HyperCharge), 15W Qi wireless67W SUPERVOOC wired, no wireless
Rear cameras50MP main (Sony Lytia 700 1/1.56-inch, gimbal OIS), 13MP ultra-wide (120-degree), 32MP telephoto 3x (OIS)48MP main, 48MP ultra-wide, 64MP periscope telephoto 3x
Dimensions163.8 × 76.8 × 8.9 mmUnfolded 153.4 × 143.1 × 5.8 mm; Folded 153.4 × 73.3 × 11.7 mm
Weight227 g239 g
Water resistanceIP68IPX4
Supported untilNov 2029Oct 2028
ROG Phone 9 Pro full verdict →Open full verdict →Longevity master board →

Scores and verdicts are computed from our verified database — see exactly how. Specs from manufacturer documentation; prices reflect major US retailers.