OnePlus 13T vs Vivo X300 Ultra

OnePlus 13T

Flagship Snapdragon 8 Elite with up to 16GB RAM and 512GB UFS 4.0 — it posted an AnTuTu over 3,000,000 (beating the standard OnePlus 13 and even the vivo X200 Pro) and handles top games well. The caveat is sustained thermals: ~52% stress-test stability and benchmark peak temps near 68°C.

• Powered by the Snapdragon 8 Elite on TSMC's 3nm node — one of the most efficient and powerful chipsets right now.
• Its AnTuTu score of 3,006,913 beats the current leader, the vivo X200 Pro, and is higher than the flagship OnePlus 13, paired with 16GB RAM and 512GB storage.
• Geekbench 6 returned ~3,080 single-core and ~9,829 multi-core; in 3DMark Steel Nomad Light it scored 2,513 with 52% stability after 20 rounds, holding ~59fps with power under 4W and body below 40°C.
• It opens apps in a blink, switches between games and socials seamlessly, and runs cool doing it — a genuine compact powerhouse.
• Genshin Impact runs ~60fps (max 61, lows to 48) at max ~39°C; PUBG is officially capped at 40fps on highest settings but very-high runs up to 80fps.
• In a sustained multi-phone benchmark drain it got the hottest of the group, with a peak around 68°C.

Vivo X300 Ultra

Snapdragon 8 Elite Gen 5 plus Vivo's custom imaging silicon delivers flagship benchmark numbers and strong gaming, but the camera-heavy hardware runs hot — sustained stress tests show roughly 60–65% stability and the camera app warms it up fast.

• At the heart is Qualcomm's current flagship Snapdragon 8 Elite Gen 5, supplemented by Vivo's custom VS1 and V3-Plus imaging chips.
• It boots in 16 seconds (vs 21s for the S26 Ultra and 19s for the iPhone 17 Pro Max) and posts an AnTuTu score over 3,800,000, stronger than Samsung.
• In a prolonged stress test it throttled CPU performance to about 60% of peak — in line with other high-powered flagships — and 3DMark stability landed around 63–66%.
• It gets a bit hot after 30–40 minutes of gaming, but with no throttling even past an hour and never uncomfortable to hold; boost mode at max graphics gives around 4 hours of Wuthering Waves on a full charge.
• Native 120fps gaming with smooth/very-high graphics in many titles, with temperature barely crossing 35°C and power draw around 4W in battle-royale modes.

OnePlus 13T

The headline feature: a 6,260mAh silicon-carbon 'Glacier Battery' — the largest in any OnePlus and, per a multi-phone drain test, the best battery life of any premium phone, beating the iPhone 16 Pro Max, S25 Ultra, Pixel 9 Pro XL and OnePlus 13. 80W SUPERVOOC wired tops it up in ~52–62 minutes; there's no wireless charging.

• The 6,260mAh silicon-carbon cell took the OnePlus 13T to a record-breaking 13 hours 42 minutes in a drain test, beating the iPhone 16 Pro Max (13h10m), Xiaomi 15 Pro, S25 Ultra and OnePlus 13.
• The OnePlus 13T dethroned the iPhone 16 Pro Max as battery champion — it can be considered to have the best battery life of all premium smartphones on the market right now.
• A 5-hour heavy-usage test left 46% battery; it charged to 56% in 25 minutes and a full charge in about 62 minutes (200 nits, 25°C).
• A 10-minute charge got 0–28% and a full 100% charge took about 52 minutes on 80W, powering the colossal 6,260mAh cell.
• One full day of heavy real-world use (gaming, podcasts, workout, calls) gave 12 hours of use and 5h14m of screen-on time before hitting 2%, with a 12%→100% charge in ~34 minutes.
• There is no wireless charging — one of the OnePlus 13 features sacrificed alongside IP68 and USB 3.0 to hit the price.

Vivo X300 Ultra

Vivo grew the silicon-carbon cell 10% to 6,600mAh while keeping the body the same size. Real-world endurance is strong — ~16h active-use score, ~7h heavy screen-on, 13–14 hour days with charge to spare — and 100W wired refills it in under an hour, with 40W wireless.

• Vivo increased the battery by 10% to 6,600mAh despite the phone being practically the same size on paper.
• In our battery test it earned an active-use score of almost 16 hours; 100W charging took it 0–66% in 30 minutes and a full charge in 46 minutes, plus 40W wireless. A charger is in the box except in Europe.
• On the China version I'm finishing entire 13–14 hour days with 25–30% left; the global version keeps the 6,600mAh cell so battery life should comfortably last 12–13 hours of heavy use.
• Getting nearly 7 hours of screen-on time with very heavy usage from the 6,600mAh silicon-carbon unit, with 100W wired and 40W wireless charging support.
• After a 4-hour heavy-usage simulation the phone still had ~45% battery left, which is solid by today's standards, and 100W wired charging takes about 45 minutes to full.

OnePlus 13T

A deliberately cut-down dual system: a 24mm-equivalent 50MP main and a 49mm-equivalent 50MP 2x telephoto — and no ultrawide at all, which reviewers unanimously call the biggest compromise. It's not Hasselblad-branded; output is competent but oversaturated and rated around 7.5/10.

• The 13T sports a dual camera system — a 24mm-equivalent main and a 49mm-equivalent (≈2x) telephoto — with the front camera maxing out at 1080p 30fps.
• OnePlus chose a telephoto over an ultrawide because most people use telephoto more, and space was at a premium — the 13s camera software is closer to the 13R than the Hasselblad-tuned OnePlus 13.
• The biggest miss is the lack of an ultrawide; overall the camera experience is about 7.5 out of 10 and massively oversaturated, though even dialed down it gives a better overall image.
• The 49mm telephoto offers 4x in-sensor lossless zoom with OnePlus's ultra-clear image algorithms — a genuine plus for telephoto-over-ultrawide shooters.
• The camera seems worse than expected, and some buyers feel misled by the name into thinking it's a smaller OnePlus 13 with one less camera rather than a different device.
• Don't buy a OnePlus for the camera — shadows can get soft, but highlights are well preserved with good colour contrast.

Vivo X300 Ultra

The reason the X300 Ultra exists: a near-1-inch 200MP 35mm main (Sony Lytia 901), a 200MP 85mm periscope, and the best ultrawide sensor on the market, tuned with Zeiss. Reviewers near-universally rate it the best-equipped camera phone of 2026 — with two important caveats: the 35mm default is divisive, and on raw image quality it's only marginally ahead of the cheaper X300 Pro.

• At the center is a 200MP main that's nearly a 1-inch sensor (Sony Lytia 901), backed by a 200MP 85mm-equivalent periscope telephoto — the phone is focused on camera quality and, even more so, video.
• Featuring three extra-large image sensors, the X300 Ultra's uncompromising camera hardware earned a solid rating — but it's hardly better than the cheaper X300 Pro in actual camera performance despite the top-notch hardware.
• I'm not sure I've seen better results from even 1-inch sensors — it's so close to 1-inch and the 35mm focal length makes for more cinematic-looking shots; the 85mm periscope is the sweet spot for portraits.
• It still holds the record for the best portrait-mode photos on a smartphone, especially at 85mm and 135mm; the 14mm ultrawide is sharp edge to edge.

OnePlus 13T

OxygenOS (launched on Android 15, now on the OxygenOS 16 track) with Aqua Touch 2.0, the customisable plus button and OnePlus AI. The update commitment is 4 OS versions + 6 years of security — solid but behind Google/Samsung's 7 years — and the new Anti-Rollback (ARB) policy has become a contentious point.

• It ships with OxygenOS 15 on Android 15 with 4 OS updates and 6 years of security patches.
• You get OnePlus's excellent Aqua Touch 2.0 plus a genuinely interesting AI component, and Call of Duty runs flawlessly at max settings.
• The customisable plus key can launch the camera, toggle the flashlight or trigger OnePlus AI features like OnePlus Mind with a single click.
• OnePlus restarted update rollouts with OxygenOS 16.0.5, bringing features like Circle to Search even with the navigation bar disabled to the 13-series.
• The new ARB (Anti-Rollback) policy is contentious — installing an ARB-enabled update permanently trips an internal fuse on the motherboard, so downgrading can brick the phone.
• Software support isn't quite as strong as Google or Samsung's 7 years, but OnePlus's 4 OS + 6 security commitment is solid.

Vivo X300 Ultra

Origin OS 6 (Funtouch with full Google services on the global model) is clean and not over-baked with AI, and Vivo now commits to 5 OS upgrades plus 7 years of security patches. The launch software was rough but patched quickly; there's no longer a configurable camera action button.

• Despite being a Chinese device using Google services, you get 5 years of OS updates and 7 years of security updates — a solid, much-improved commitment.
• AI is present across the camera and day-to-day tools, but unlike Samsung you don't have to use AI in every single sense — it's not overbaked to the nth degree.
• Origin OS 6 introduces more transparency in the UI; brands like Vivo and Oppo have changed a lot over the past two years, easing the usual Chinese-variant fears.
• Being the first global launch for a Vivo Ultra there was an early-software rough patch, but an update arrived about 4 days later — the kind of thing Vivo can fix easily via software.