The Creality K3 and Prusa Research MK4S are cross-brand rivals: both are prosumer-tier printers, listed $120 apart. Both are open-frame printers with a 500 mm/s rated top speed and automatic calibration. The K3 costs $120 more and gets you 52% more build volume and 4-slot multicolor; the MK4S answers with extra engineering materials (ABS, ASA, PA and PC) and an open-source design.
First-generation product — recently released, still early days
Best for: Multicolor hobbyists and small creators who are tired of purge towers and filament waste, and who want tool-changer-style multicolor at well under half the price of Bambu's tool changers.
Full details →Late in cycle — but an upgrade kit is available. Existing owners can upgrade without buying new
🔧 Upgrade kit available — from MK4, MK3.5
Best for: Makers who value open-source hardware, community support, long-term repairability, and battle-tested reliability over raw speed or multicolor features.
Full details →| Creality K3 | Prusa Research MK4S | |
|---|---|---|
| Pricing | ||
| Starting Price | $849 | ★ $729 |
| Print Specs | ||
| Tier | Prosumer | Prosumer |
| Motion | CoreXY | BedSlinger |
| Build Volume | ★ 260 × 260 × 260 mm | 250 × 210 × 220 mm |
| Max Speed | 500 mm/s | 500 mm/s |
| Multicolor | ★ ✅ 4 slots | ❌ No |
| Enclosure | ❌ | ❌ |
| Auto Calibration | ✅ | ✅ |
| Open Source | ❌ | ★ ✅ |
| Upgrade Kit | — | 🔧 From MK4, MK3.5 |
| Buy Timing | ||
| Released | Oct 13, 2026 | Aug 13, 2024 |
| Cycle length | — | ~730 days |
| Cycle advice | Buy | Upgrade Kit |
| Deals advice | Caution | Buy |
| Next model | — | — |
The K3 was released on Oct 13, 2026, 30 days ago. It is a first-generation product, so there is no earlier cycle to predict its successor from.
The MK4S was released on Aug 13, 2024, 821 days ago. Its previous release cycle ran about 730 days; it is now 91 days past that point and no successor has been announced.
On timing alone, the K3 is the safer buy right now — it launched only 30 days ago, while the MK4S is 91 days past its ~730-day cycle with no successor announced.
Cycle and deal status as of November 12, 2026. See the launch calendar →
The MK4S lists at $729 and the K3 at $849 — $120 apart, so the K3 costs 16% more.
Per litre of build volume, that works out to $48 for the K3 versus $63 for the MK4S — so the pricier K3 actually gives you more build space per dollar.
Our pick for most buyers is the MK4S, for a lower price ($120 less) and extra engineering materials (ABS, ASA, PA and PC), plus a higher editor score (8.9 vs 8.0). Go for the K3 instead if you print large parts — its 260 × 260 × 260 mm build volume holds 52% more than the MK4S's 250 × 210 × 220 mm.
How we judge timing and deals: read our methodology →
Four docked nozzles swap in about 5 seconds, so color changes no longer require purging a single nozzle. Creality quotes up to 85% less filament waste and up to 80% shorter multicolor print times.
Nozzles from 0.2 to 0.8 mm can be mixed in one print using extra nozzles sold separately. With a dedicated nozzle, TPU 95A prints without the feeding problems common to filament-switching systems.
The K3 brings near-tool-changer multicolor to a sub-$900 printer, well below Bambu's $2,399 H2C and $2,499 H3C.
MK4 and MK3.5 owners can upgrade to MK4S specs without purchasing a whole new printer. This is Prusa's commitment to owners and is unique in the industry at this level.
Firmware, PCB schematics, hardware designs, and slicing profiles are all published under open licenses. You own the printer completely.
Prusa's forum, knowledge base, and repair guides are unmatched. Parts are stocked and available for years after purchase.