First-generation product — no release history to base predictions on
Best for: Engineers and professional makers who need large-format enclosed printing with active chamber heating — and want Prusa's open-source ethos and long-term support over a closed-ecosystem competitor.
Full details →Mid-cycle — watch for announcements before buying
🔧 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 →| Prusa Research CORE One L | Prusa Research MK4S | |
|---|---|---|
| Tier | Professional | Prosumer |
| Motion | CoreXY | BedSlinger |
| Build Volume | 300 × 300 × 330 mm | 250 × 210 × 220 mm |
| Max Speed | 500 mm/s | 500 mm/s |
| Multicolor | ❌ No | ❌ No |
| Enclosure | ✅ | ❌ |
| Auto Calibration | ✅ | ✅ |
| Open Source | ✅ | ✅ |
| Upgrade Kit | — | 🔧 From MK4, MK3.5 |
| Materials | PLA, PETG, ABS, ASA, TPU, PA, PA-CF, PC | PLA, PETG, ABS, ASA, TPU, PA, PC |
| Released | Jan 1, 2025 | Mar 20, 2024 |
| Cycle length | — | ~730 days |
| Cycle advice | Caution | Caution |
| Deals advice | Caution | Caution |
| Next model | — | Prusa MK5 (Expected 2027) |
A large enclosed build volume with genuine active chamber heating — making the CORE One L reliable for ABS, ASA, PA, and PC across the full build plate.
All firmware, hardware designs, and slicing profiles are open source. Prusa backs the CORE One L with long-term parts availability and community support.
For institutional, government, and production customers, a dedicated Critical Infrastructure Edition is offered — Prusa's commitment to secure supply for professional users.
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.