Prusa Research CORE One LvsPrusa Research MK4S

Same ecosystem (Prusa Research): Both printers share the same software, slicer, and filament ecosystem. This is a tier step-up comparison — consider whether the extra features justify the price difference.

Prusa Research CORE One L

Buy/Wait:Buy

First-generation product — recently released, still early days

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.

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Prusa Research MK4S

Buy/Wait:Upgrade Kit

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.

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	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
Released	Nov 7, 2025	Mar 20, 2024
Cycle length	—	~730 days
Cycle advice	Buy	Upgrade Kit
Deals advice	Caution	Buy
Next model	—	Prusa MK5 (Expected 2027)

Materials

Prusa Research CORE One L only

PA-CFCarbon-fibre nylon — very stiff, abrasive to standard nozzles

Both

PLAEasy to print, no enclosure needed — everyday parts

PETGTougher, slightly flexible, moisture-resistant

ABSHeat and impact resistant — needs enclosure

ASAUV-stable ABS alternative — outdoor parts, needs enclosure

TPUFlexible rubber-like — phone cases, gaskets, wheels

PANylon — strong and wear-resistant, needs dry storage

PCPolycarbonate — extremely tough, challenging to print

Prusa Research MK4S only

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Why buy each?

Prusa Research CORE One L

300×300×330 mm with active 60°C chamber heating

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.

Fully open source

All firmware, hardware designs, and slicing profiles are open source. Prusa backs the CORE One L with long-term parts availability and community support.

Critical Infrastructure Edition available

For institutional, government, and production customers, a dedicated Critical Infrastructure Edition is offered — Prusa's commitment to secure supply for professional users.

Prusa Research MK4S

Upgrade kit available — no need to buy new

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.

Fully open source

Firmware, PCB schematics, hardware designs, and slicing profiles are all published under open licenses. You own the printer completely.

Best community and documentation

Prusa's forum, knowledge base, and repair guides are unmatched. Parts are stocked and available for years after purchase.