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Compare Keychron K4 Max vs K4 Ultra Differences Side by Side

Explore the comprehensive side-by-side comparison of the Keychron K4 Max and Keychron K4 Ultra and view their biggest differences. The detailed comparison table allows you to see all the essential features, specifications, and benefits of each keyboard at a glance. Whether you're looking for performance, value, or specific functionalities, this comparison tool helps you make an informed decision.

87
Keychron K4 Max QMK Wireless Mechanical Keyboard ISO Layout Collection
74
Keychron K4 Ultra 8K Wireless Custom Mechanical Keyboard

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5.0 (1)
0.0 (0)
  • Released in 2025
  • Built with the ISO, ANSI layout standard
  • Supports QMK firmware
  • Supports VIA configuration
  • Uses a PCB Mount mounting style
  • Runs at a 1000 Hz polling rate
  • Weighs about 1290 g
  • Offers Yes, Rgb, South-face, Rgb South-face, White, White South-face RGB lighting
  • Released in 2026
  • Built with the ANSI layout standard
  • Connects via USB-C
  • Uses a Plate Mount mounting style
  • Runs at a 8000 Hz polling rate
  • Weighs about 1241 g
  • Offers Yes, Rgb, White, South-face, Rgb South-face, White South-face RGB lighting
Scores
  • Performance: 82.2
  • Build Quality: 80.6
  • Productivity: 89.6
  • Customizability: 92.8
  • Portability: 50.8
Scores
  • Performance: 88.3
  • Build Quality: 63.4
  • Productivity: 86.5
  • Customizability: 74.9
  • Portability: 56.4
Name
Keychron K4 Max
Name
Keychron K4 Ultra
Release year
2025
Release year
2026
Switch Options
Linear, Tactile, Clicky
Switch Options
Linear, Tactile, Clicky
Profile
Normal Profile
Profile
Normal Profile
Hot Swappable
 
Hot Swappable
 
Layout Size
96%
Layout Size
96%
Layout Standard
ISO, ANSI
Layout Standard
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
PCB Mount
Mount Style
Plate Mount
Screw in Stabilizers
 
Screw in Stabilizers
 
Sound Dampening
 
Sound Dampening
 
Backlight
 
Rgb, South-face, White, White South-face
Backlight
 
Rgb, White, South-face, White South-face
Case Colors
Case Colors
Case Material
ABS
Case Material
ABS
Keycaps Material
PBT
Keycaps Material
PBT
Dimensions
31 x 391 x 140 mm
Dimensions
31 x 391 x 140 mm
Weight
1290g
Weight
1241g
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