Keychron K10 Ultra vs K5 UltraFull-Size or Slim
Choose the K10 Ultra for its larger battery and standard-profile setup, or the K5 Ultra for a lighter low-profile design with an integrated knob.
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3.0 (2)3.0 · 2 reviews
from$114at MK
5.0 (4)5.0 · 4 reviews
from$114at Keychron
Which one should you get?
Get the
Keychron K10 Ultra
Battery
Build quality in the top 10% of 100% boards under $150.
- 4000mAh battery, with vendor-rated use up to 600 hours with backlighting off.
- 8000 Hz polling in wired and 2.4 GHz modes, according to the vendor.
- Hot-swappable switches, with QMK and VIA support listed.
- South-facing LEDs. Shine-through legends stay dark, and some sculpted keycaps can clip the LED.
- Missing ISO-DE, ISO-FR, ISO-ES. The other board is sold in those layouts.
Get the
Keychron K5 Ultra
Knob
Build quality in the top 15% of 100% boards under $150.
- Low-profile full-size design weighs 566g in the product metadata.
- Integrated knob offers volume control and customizable commands, according to the vendor.
- Aluminum and wood body with an anodized aluminum-alloy plate.
- Low-profile switches and keycaps only. Standard MX keycaps will not fit.
- North-facing LEDs. Cherry-profile keycaps can hit the switch housing.
Pick the K10 Ultra if longer battery life, a standard-profile board, and its steel-plate construction are the priorities. Choose the K5 Ultra if you value a lighter low-profile keyboard and its customizable knob, and are prepared to use low-profile-compatible switches and keycaps. Both deliver the same listed 8000 Hz polling in wired and 2.4 GHz modes, so ergonomics and portability are the more useful deciding factors.
The differences that matter
Skip the 40-row spec sheet. These are the specs that change how each board feels, sounds, and fits your desk.
Keychron K10 Ultra
Keychron K5 Ultra
Battery
4,000 mAh
2,600 mAh
A larger battery means fewer cables during the day
Low profile
No
Yes
Case material
ABS, Aluminum, Plastic
ABS, Metal, Wood
Knob
No
Yes
Weight
1,495 g
566 g
Heavier boards stay planted and lighter ones travel
- Keychron K10 Ultra
- Keychron K5 Ultra
- Performance
- 9091
- Build quality
- 8375
- Productivity
- 9493
- Customizability
- 9189
- Portability
- 5656
- Layout size: 100%
- Connection: Bluetooth, 2.4 GHz, Wired
- Hot-swappable
- Max polling rate: 8,000 Hz
- Switch options: Clicky, Linear, Tactile
- QMK
What will you mostly use it for?
The K5 Ultra is the more travel-oriented and control-focused option, with its lower weight, low-profile form, and knob. The K10 Ultra suits buyers who want a larger battery, standard-profile typing, and broader firmware-support listings. Gaming is close on listed connectivity and polling, so neither has a clear spec-based edge there. For modding, both offer hot-swap and customization support, but keycap compatibility and the K10's documented internal materials distinguish them.
It's a tie
- Both list 8000 Hz polling and 2.4 GHz connectivity.
- Both support N-key rollover and offer linear switch options.
- The K10 has a 4000mAh battery, while the K5 is lighter at 566g.
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Keychron K10 Ultra
2 owner reviews
“Keychron has never let me down. I have paid a lot more for other keyboards from other manufacturers and received a lot less. I will never look elsewhere again”
“I see why it was discounted. Fresh out of the box, it would not connect to my PC, which is literally 3 feet away. The 2.4G connection is extremely buggy, and I’ve had constant disconnects DAILY. On top of that, I had multiple sticking keys right out of the…”
Keychron K5 Ultra
4 owner reviews
“This keyboard is exactly what I was looking for. Low profile, great switches, not uber gamery. Very happy so far, hopefully it keeps working for a long time.”
Keychron K10 Ultra vs K5 Ultra specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
10 of 27 specs differ
Keychron K10 Ultra
Keychron K5 Ultra
Switch options
Hot-swappable
Mount style
Low profile
Sound dampening
Screw-in stabilizers
Layout size
Layout standard
Ergonomics
Knob
Display
Media keys
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Backlight
QMK
VIA
N-key rollover
Mac & Windows
Released
ISO layouts by store
Which stores sell ISO-DE, UK, and the other regional layouts.
Keychron K10 Ultra
Keychron (DE)
ISO
In stockDoes not ship to you
Keychron K5 Ultra
Keychron (DE)
ISO-DE, ISO-FR, ISO-ES, ISO-IT
In stockDoes not ship to you
Compare prices
Live prices from the stores we track, cheapest in-stock offer first.
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Lowest price across stores, Amazon excluded.
Keychron K10 Ultra vs K5 Ultra: your questions
The K10 Ultra is a standard-profile full-size keyboard with a 4000mAh battery. The K5 Ultra is low-profile, weighs 566g in the product metadata, and adds an integrated knob.
The K10 Ultra has a 4000mAh battery and a vendor-rated maximum of 600 hours with backlighting off. The K5 Ultra has a 2600mAh battery and a vendor-rated maximum of 370 hours under the same backlight-off condition.
Yes, both list 8000 Hz polling in wired and 2.4 GHz modes. Their vendor specifications list 125 Hz polling in Bluetooth mode.
The K5 Ultra is lighter, at 566g in the product metadata. The K10 Ultra weighs 1495g, so the K5 is the more practical of the two for frequent moves.
Yes, the K5 Ultra has an integrated aluminum rotary encoder. The vendor describes volume control as its default function and says its commands can be customized with Keychron Launcher.
No, the K5 Ultra requires low-profile switches and keycaps, and standard MX keycaps will not fit. Its north-facing LEDs may also conflict with Cherry-profile keycaps.
Yes, both list hot-swappable switch support. The K10 vendor describes swapping switches without soldering, and the K5 vendor says its Milk POM switches can be swapped without soldering.
The K10 Ultra is listed in ISO, JIS, and ANSI layouts. The K5 Ultra lists ISO-DE, ISO-ES, ISO-FR, ISO-IT, ISO-PT, ISO, and ANSI, so it includes several regional ISO options absent from the K10 listing.
Both product metadata listings include QMK and VIA support. Their vendor descriptions also discuss ZMK firmware and Keychron Launcher, so check the specific feature you need before choosing.
The K10 Ultra is a reasonable pick if you want its full-size layout, multimedia keys, and listed QMK and VIA support. The K5 Ultra may appeal if you prefer a low-profile board and want to use its knob for customizable commands.
The K10 Ultra has south-facing LEDs, and its compatibility rules warn that shine-through legends stay dark. Some sculpted keycaps can also clip the LEDs.
Both list Mac/Windows support, and their vendor descriptions specify compatibility with macOS and Windows. The vendor descriptions also name Linux support for both keyboards.
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