The CORE One L delivers Prusa’s trademark build quality, offering a large-format machine that still fits on your desk. Its premium price is steep, but the machine’s reliability, plug-and-play ease of use, and security features make it easy to recommend.
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It didn’t take long for Josef Prusa to follow up his popular CORE One 3D printer with a beast of a machine: the CORE One L. This “large” printer with a 300 x 300 x 330 mm build volume is a major shift from Prusa Research’s well-known i3 style. It still shares many of the same parts as the CORE One and MK4s, which will keep production costs down, but the CORE One L has a new AC-powered aluminum heat bed for even coverage and replaces a substantial amount of steel with lighter aluminum. This allows the CORE One L to have twice the print volume of the original machine while only taking up 10% more space.
It's unlikely the CORE One L will have a kit version, as the AC-powered heat bed is not for tinkerers. The 3D printer is still built with easy maintenance in mind and open source parts for lifetime repairability. The printer is also designed to operate completely offline if you choose, without dependence on the cloud for complete security. However, if you enjoy the convenience of mobile apps, the Prusa App offers remote printer operation, full access to Printables.com for model selection, and a lite version of PrusaSlicer for custom slicing on the go.
The CORE One L has a few clever tricks up its sleeve: it can flip the top vent open or close on its own, a flip of a switch makes loading (and running) TPU super easy, and strategically mounted fans control air flow and heat so the door can remain closed at all times. The chamber can hit 60 °C, making engineering-grade filaments as easy to run as PLA. It will also be the first 3D printer compatible with Prusa-backed OpenPrintTag, an open source initiative to create a universal “smart” spool with NFC tags that customers can reuse as they wish.
The CORE One L retails at $1,799 (including import duties and tariffs) and comes with 24/7 customer service and a complete ecosystem. This machine lives up to its reputation and is one of the best 3D printers we’ve tested to date.
Specifications: Prusa CORE One L
Swipe to scroll horizontally Build Volume 300 x 300 x 330 mm (11.8 x 11.8 x 12.99 in) Material PLA/PETG/TPU/ABS/ASA /PC (up to 290 degrees) Extruder Type Direct drive Nozzle .4mm (Highflow CHT & Hardened Steel) Build Platform PEI spring steel flex plate Bed Leveling Fully automatic Filament Runout Sensor Yes Connectivity USB, LAN, Wi-Fi, App Interface 3.5″ color screen touch screen with additional knob Machine Footprint 469×521×635 mm (18.5×20.5×25in) Machine Weight 21.9 KG (48.28 lbs) MSRP $1,799 Release Date November 19, 2025
Prusa CORE One L: Included in the Box
(Image credit: Tom's Hardware)
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