Keychron B6 Pro vs K5 ProSlim Membrane vs Custom Mechanical
Choose the B6 Pro for its extreme slimness and lower cost, or the K5 Pro for its mechanical feel, hot-swap capability, and advanced firmware support.
Which one should you get?
Get the
Keychron B6 Pro
Slim Membrane
- Extremely slim and lightweight design, with a body thickness of just 5.2mm.
- Claims an exceptionally long 1200-hour battery life on a single charge.
- Includes a 2.4 GHz wireless connection option alongside Bluetooth and wired.
- Uses membrane-style switches, which may feel less tactile than mechanical switches.
- Keycaps are made of ABS plastic, which is more prone to shine over time compared to PBT.
- Lacks adjustable typing feet, offering only a fixed 3-degree angle.
Get the
Keychron K5 Pro
Custom Mechanical
- Features genuine Gateron low-profile mechanical switches for a tactile typing feel.
- Offers a hot-swappable version for easy switch customization.
- Supports QMK and VIA firmware for extensive, open-source programmability.
- Heavier and thicker than the B6 Pro, making it less portable.
- The vendor notes the Keychron Launcher web app is required for programming, and VIA support may not be straightforward for all layouts.
- Battery capacity (2000mAh) is larger but may not last as long as the B6 Pro's claimed life due to RGB lighting.
Your budget and core priority dictate the choice. If you want the thinnest, lightest possible full-size keyboard and prefer a quiet, low-travel membrane feel, the Keychron B6 Pro is the clear pick. If you value a mechanical typing experience, want the ability to hot-swap switches, and plan to dive into deep customization with QMK/VIA, the Keychron K5 Pro is worth the extra investment.
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 B6 Pro
Keychron K5 Pro
Connection
Bluetooth, 2.4 GHz, Wired
Bluetooth, Wired
Hot-swappable
No
Yes
Battery
1,200 mAh
2,000 mAh
Case material
ABS, Plastic
ABS, Aluminum, Plastic
Mount style
Plate Mount
Tray Mount
- Keychron B6 Pro
- Keychron K5 Pro
- Performance
- 5480
- Build quality
- 4579
- Productivity
- 6881
- Customizability
- 5389
- Portability
- 5156
- Layout size: 100%
- Low profile
- Max polling rate: 1,000 Hz
- Switch options: Clicky, Linear, Tactile
What will you mostly use it for?
The K5 Pro is the more capable and customizable keyboard, winning for Gaming, Programming, Modding, and Content Creation due to its mechanical switches, hot-swap support, and advanced firmware. The B6 Pro's primary advantage is in Travel, thanks to its lighter weight and slimmer profile. For general Office use, they tie, offering strong multi-device support but with different typing experiences and battery life claims.
Pick the Keychron K5 Pro
- Both have a 1000 Hz polling rate in wired mode, but the K5 Pro's vendor page specifically mentions this is engineered for competitive gaming.
- The K5 Pro features N-key rollover for both wireless and wired modes, a spec not mentioned for the B6 Pro.
- The K5 Pro's mechanical switches may offer more consistent actuation for gaming.
What owners say
Ratings and quotes collected from verified store reviews, including the critical ones.
Keychron B6 Pro
10 owner reviews
“Great ultra slim keyboard. Would like to see a similar design as this with backlighting and maybe legs for adjustable height.”
Keychron K5 Pro
8 owner reviews
“I love my new keyboard! It's the typing experience I've been seeking.”
Keychron B6 Pro vs K5 Pro specs
Every tracked spec, side by side. Rows marked with a dot differ between the boards.
14 of 25 specs differ
Keychron B6 Pro
Keychron K5 Pro
Switch options
Hot-swappable
Mount style
Low profile
Layout size
Layout standard
Ergonomics
Display
Media keys
Connection
Max polling rate
Battery
USB-C
Case material
Plate material
Keycaps
Weight
Dimensions
Typing angle
Backlight
QMK
VIA
N-key rollover
Mac & Windows
Released
Compare prices
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Keychron B6 Pro vs K5 Pro: your questions
The fundamental difference is the switch technology. The B6 Pro uses an ultra-slim membrane mechanism, while the K5 Pro uses low-profile Gateron mechanical switches. This results in a much thinner profile for the B6 Pro but a more tactile and customizable typing experience on the K5 Pro.
According to their vendor pages, the Keychron B6 Pro claims a battery life of up to 1200 hours. The K5 Pro has a 2000mAh battery, but no specific hour rating is provided. The B6 Pro's lack of RGB lighting likely contributes to its longer claimed endurance.
Yes, but only if you purchase the hot-swappable version of the Keychron K5 Pro. The vendor description specifies that this version allows you to hot-swap Gateron low-profile mechanical switches without soldering. The standard soldered version does not offer this feature.
No, the Keychron B6 Pro is not a mechanical keyboard. It is described as an ultra-slim wireless keyboard and uses a low-profile membrane mechanism, which is different from the individual mechanical switches found in the K5 Pro.
The Keychron K5 Pro is generally better suited for programming. It supports QMK and VIA firmware, allowing for deep key remapping and macro creation, which is valuable for coding workflows. Its mechanical switches can also provide better feedback during long typing sessions.
Yes, both the Keychron B6 Pro and K5 Pro are fully compatible with macOS and Windows. Their vendor descriptions state they offer Mac layouts with included keycaps for both operating systems, and they have a physical switch to change between OS modes.
The Keychron B6 Pro is more portable. It weighs 623g compared to the K5 Pro's 720g and has a significantly slimmer profile at 5.2mm thick. Its lighter weight and thinner design make it easier to carry in a bag.
Yes. The Keychron K5 Pro vendor page states it comes with more than 22 types of RGB backlight settings and allows you to fine-tune the hue, saturation, brightness, and effect speed. The B6 Pro does not have backlighting.
The Keychron B6 Pro uses ABS plastic keycaps. The Keychron K5 Pro uses double-shot PBT keycaps, which are generally more durable and resistant to the oily shine that develops on ABS over time.
The vendor description for the Keychron K5 Pro only mentions Bluetooth and wired connectivity. The Keychron B6 Pro, however, explicitly supports a 2.4 GHz wireless connection in addition to Bluetooth and wired modes.
The Keychron K5 Pro features three levels of adjustable typing angle, according to its vendor description. The Keychron B6 Pro has a fixed, non-adjustable typing angle of 3 degrees.
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