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Compare Keychron J4 QMK vs V1 Ultra Differences Side by Side

This comparison is for buyers deciding between two of Keychron's popular wireless mechanical keyboards. The J4 QMK offers a familiar 80% TKL layout, while the V1 Ultra 8K packs high-end features like an 8000Hz polling rate and gasket mount design into a more compact 75% frame. The decision hinges on whether you prioritize a classic layout and lower cost or are willing to pay more for cutting-edge performance and a premium acoustic experience.

72
Keychron J4 QMK Wireless Mechanical Keyboard (US ANSI Layout)
93
Keychron V1 Ultra 8K Wireless Custom Mechanical Keyboard ISO Layout Collection

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0.0 (0)
5.0 (1)
  • Released in 2025
  • Has Tactile, Linear switch options
  • Available in a 80% layout
  • Built with the ANSI layout standard
  • Runs at a 1000 Hz polling rate
  • Weighs about 870 g
  • Sized at 38 x 366 x 138 mm
  • Made with a ABS case
  • Offers Yes, Rgb, White, North-face, Rgb North-face, White North-face RGB lighting
  • Released in 2026
  • Has Tactile, Linear, Clicky switch options
  • Available in a 75% layout
  • Built with the ISO-DE, ISO-ES, ISO-FR, ISO, ANSI layout standard
  • Comes with a knob
  • Provides dedicated media keys
  • Supports VIA configuration
  • Includes screw-in stabilizers
  • Uses a Gasket Mount mounting style
  • Runs at a 8000 Hz polling rate
  • Weighs about 770 g
  • Sized at 29 x 329 x 149 mm
  • Made with a Plastic, ABS case
  • Offers Yes, Rgb, White, South-face, Rgb South-face, White South-face RGB lighting
Scores
  • Performance: 79.4
  • Build Quality: 61.2
  • Productivity: 84.4
  • Customizability: 74.6
  • Portability: 73.5
Scores
  • Performance: 91.1
  • Build Quality: 83.9
  • Productivity: 97.7
  • Customizability: 95.2
  • Portability: 80
Name
Keychron J4 QMK
Name
Keychron V1 Ultra
Release year
2025
Release year
2026
Switch Options
Tactile, Linear
Switch Options
Tactile, Linear, Clicky
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
80%
Layout Size
75%
Layout Standard
ANSI
Layout Standard
ISO-DE, ISO-ES, ISO-FR, ISO, ANSI
Layout Ergonomics
Normal
Layout Ergonomics
Normal
Knob Support
 
Knob Support
 
Display Support
 
Display Support
 
Mac/Win Support
 
Mac/Win Support
 
Multi-Media Keys
 
Multi-Media Keys
 
USB-C
 
USB-C
 
USB passthrough
 
USB passthrough
 
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Connection
Bluetooth, 2.4 GHz, Wired, Wireless
Polling Rate
1000 Hz
Polling Rate
8000 Hz
Battery capacity
4000 mAh
Battery capacity
4000 mAh
Hall Effect Support
 
Hall Effect Support
 
QMK Support
 
QMK Support
 
VIA Support
 
VIA Support
 
VIAL Support
 
VIAL Support
 
N-Key Rollover
 
N-Key Rollover
 
Rapid Trigger
 
Rapid Trigger
 
Mount Style
-
Mount Style
Gasket Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, White, North-face
Backlight
 
Rgb, White, South-face, White South-face
Case Colors
Case Colors
Case Material
ABS
Case Material
Plastic, ABS
Keycaps Material
PBT
Keycaps Material
PBT
Dimensions
38 x 366 x 138 mm
Dimensions
29 x 329 x 149 mm
Weight
870g
Weight
770g
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Pros and Trade-offs

The Keychron V1 Ultra 8K is the more feature-rich and performance-oriented choice, justifying its higher cost with an 8000Hz polling rate, gasket mount, and superior battery life. The Keychron J4 QMK remains a compelling option for those who prefer a TKL layout and want core wireless programmability with QMK at a more budget-friendly price. Your decision should primarily be guided by whether you value cutting-edge wireless performance and a premium typing feel or a traditional layout and cost savings.

Keychron J4 QMK

  • +Traditional 80% TKL layout with dedicated navigation keys.
  • +Supports QMK firmware for extensive programmability.
  • +Features multiple acoustic foams including IXPE and EPDM.
  • +Includes a Last Key Priority (LKP) feature for gaming.
  • +Offers a choice between Cherry and MDA profile keycaps.
  • −Lower 1000 Hz polling rate compared to the V1 Ultra's 8000 Hz.
  • −Heavier weight (870g) and larger dimensions.
  • −Uses a steel plate, which may result in a firmer, less dampened sound than a polycarbonate plate.
  • −Smaller 3750mAh battery.

Keychron V1 Ultra

  • +High 8000 Hz polling rate in both wired and 2.4 GHz wireless modes.
  • +Gasket mount design with a polycarbonate plate for a softer typing feel.
  • +Includes a control knob and screw-in stabilizers.
  • +Superior rated battery life of up to 660 hours.
  • +More compact 75% layout saves desk space.
  • −Higher price point than the J4.
  • −75% layout requires using a function layer for some navigation keys.
  • −Uses ZMK firmware instead of the more established QMK (though still programmable via Launcher).
  • −Shallower 4-degree typing angle may not suit all users.

Which Keyboard Is Better for Your Needs?

The V1 Ultra takes the lead for gaming, travel, modding, and content creation, largely due to its high polling rate, efficient design, gasket mount, and included knob. The J4 is a strong contender for programming with its TKL layout. For general office use, both are capable, making the choice one of layout preference. The V1 Ultra's advantages come at a higher price point, while the J4 offers core wireless and programmability features at a more accessible cost.

GamingKeychron V1 Ultra
  • •The V1 Ultra offers an 8000 Hz polling rate in both wired and 2.4 GHz modes for lower latency.
  • •Its Last Key Priority (LKP) feature is noted for smoother directional changes in games.
  • •The gasket mount and polycarbonate plate may provide a more consistent typing feel during rapid key presses.
OfficeTie
  • •Both support multi-device Bluetooth connectivity for switching between computers and tablets.
  • •Both include Mac and Windows keycaps and system compatibility.
  • •The J4's TKL layout retains dedicated navigation keys, while the V1 Ultra's 75% layout saves desk space.
ProgrammingKeychron J4 QMK
  • •The J4's 80% TKL layout provides dedicated arrow and navigation keys without a full-size footprint.
  • •QMK firmware support allows for deep key remapping and macro creation.
  • •The steel plate may offer a more consistent, rigid typing feel preferred by some typists.
TravelKeychron V1 Ultra
  • •The V1 Ultra is lighter (770g vs 870g) and has a smaller overall footprint (75% vs 80%).
  • •It boasts a significantly larger rated battery life of up to 660 hours with lighting off.
  • •Its lower 4-degree typing angle might be more suitable for use on laps or varied surfaces.
ModdingKeychron V1 Ultra
  • •The V1 Ultra features a gasket mount design and a polycarbonate plate for a softer, customizable typing feel.
  • •It includes screw-in stabilizers, which are generally preferred for modding over clip-in variants.
  • •The vendor description lists multiple internal foam layers (EPDM, PET, acoustic foam) for sound tuning.
Content CreationKeychron V1 Ultra
  • •The V1 Ultra includes a knob for media control and volume adjustment.
  • •Its multi-zone Mix RGB lighting allows for creative, layered visual setups.
  • •The compact 75% layout frees up valuable desk space for graphics tablets or other peripherals.

Frequently Asked Questions (FAQ)

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