Prusa Core One.

The Gavler Review.

Prusa Core One Review: An All-Steel CoreXY Built to Outlast the Category

The Prusa Core One sits at number two on our Best 3D Printers list with a 9.6, and it answers a question Prusa's community has asked for years: what would a fully enclosed CoreXY machine from the most trusted name in open-source 3D printing actually look like? The answer is a tank — an all-steel exoskeleton frame, active chamber control, and firmware you can read, modify, and repair for as long as you own the printer. Buy it if you want a printer engineered to still be running, and still be supported, in five years. Skip it if raw speed and price-per-print matter more to you than repairability — the Bambu Lab P2S beats it on both at roughly half the cost.

What it actually is

The Core One is Prusa's answer to a decade of reliability data applied to a from-scratch CoreXY design. The all-steel exoskeleton frame — nothing welded or glued — is the defining structural choice: it provides rigidity that flexing aluminum extrusion frames can't match, and every component is designed to be field-replaceable rather than sealed into a disposable module.

The enclosed chamber reaches 55°C with active temperature control, which matters for ABS and ASA prints that warp badly in open-air printers, and can be actively held under 30°C for PLA. Print speed runs roughly 20 percent faster than Prusa's own MK4S, driven by CoreXY kinematics paired with the proven Nextruder direct-drive extruder. Automatic calibration handles bed leveling, input shaping, and pressure advance without manual tuning — a real departure from the manual-first-layer culture around earlier Prusa machines.

At $949 as a kit or $1,199 assembled, it costs roughly double the Bambu Lab P2S. That premium buys Prusa's legendary support infrastructure, a design built around easy field maintenance, and firmware that is fully open-source rather than tied to a manufacturer's cloud ecosystem.

In use

The build quality is the first thing every reviewer lands on. TechRadar called the steel exoskeleton "nearly indestructible, and nothing is welded or glued — designed for easy maintenance from day one," which is the through-line for the whole machine: this is a printer designed to be opened up and fixed, not replaced.

Tom's Hardware's assessment captures the value proposition precisely: "Arguably the most complete enclosed prosumer printer available — the combination of active chamber control, automatic calibration, and Prusa's legendary support makes it a standout." 3D PUT frames the price question directly and answers it in the Core One's favor: "Is this CoreXY printer worth the price? For anyone who values repairability and open-source firmware, absolutely." 3D Tech Valley's take zeroes in on what changed from the original Core One release: "Reliable, fast, and finally future-proof. The Core One Plus fixes every complaint about the original."

Day to day, the combination of active chamber control and automatic calibration means the printer behaves consistently across materials without the manual tuning that engineering-filament printing usually demands on open-frame machines.

Where it shines

• Built for a decade, not a product cycle. The all-steel exoskeleton and field-replaceable-everything design philosophy mean the Core One is engineered to be maintained, not discarded, when a part eventually wears out.
• Active chamber control up to 55°C. That range covers genuinely demanding engineering filaments — ABS, ASA, and beyond — without aftermarket enclosure mods, while still cooling for clean PLA prints.
• Fully open-source firmware. PrusaSlicer and the printer's firmware are open, which means the Core One's usefulness doesn't depend on any single company's cloud service staying online or a subscription staying active.

The trade-offs — who should skip it

This is the most durable, most repairable printer on the list — not the fastest or cheapest, and the honest reasons to look elsewhere are specific:

• You're optimizing for speed and value. The Bambu Lab P2S costs roughly half as much, prints notably faster, and covers a comparable build volume with a servo extruder that handles demanding filaments well. If raw capability-per-dollar is the priority, the P2S wins.
• You need more build volume. At 250 x 220 x 270mm, the Core One's chamber is actually slightly smaller than the P2S's 256mm cube. Neither is a large-format printer.
• You're on a tight budget. Even the $949 kit price is a real premium over entry-level enclosed printers like the Bambu Lab P1S at $399. If you're printing PLA occasionally and don't have a strong repairability preference, that's the more practical starting point.

How it compares

The Core One's closest rival sits directly above it on the list: the Bambu Lab P2S at rank one, priced at $599 with a faster print speed ceiling and a comparable build volume, backed by a DynaSense servo extruder that handles demanding filaments without the Core One's open-source premium. The trade Prusa is asking buyers to make is explicit — pay roughly double for a steel frame, field-repairability, and firmware independence instead of Bambu's faster, cheaper, more closed ecosystem. For makers who've been burned by disposable hardware before, or who simply want to own their printer's whole stack, that trade is worth making. For everyone optimizing purely for speed and value, the P2S is the better buy.

The Gavler verdict

A 9.6, with a 96 expert consensus that edges slightly ahead of a 94 community rating — the small gap traces to buyers weighing the smaller build volume and the premium over Bambu alternatives against the durability payoff. The Core One isn't trying to win a spec sheet; it's trying to be the printer you're still running, unmodified and fully supported, five years from now. If that's the bet you want to make, the Core One is close to the only printer on this list built explicitly to win it. If you just want the fastest, most capable printer for the money today, buy the Bambu Lab P2S instead.

Common Questions

Is the Prusa Core One worth it in 2026?

For makers who value repairability and long-term support over spec-sheet speed, yes. It ranks second on Gavler's Best 3D Printers list with a 9.6, built on an all-steel exoskeleton frame, active chamber control up to 55 degrees Celsius, and fully open-source firmware. The honest caveat is price: at 1,199 dollars assembled it costs roughly double the class-leading Bambu Lab P2S, and the smaller 250 x 220 x 270mm build volume means you're paying more for durability and openness, not raw capability.

Prusa Core One kit or assembled?

The kit runs about 949 dollars and the assembled unit about 1,199 dollars. Buy the kit if you're comfortable with a multi-hour build and want to understand the machine you'll eventually be servicing yourself — Prusa's field-maintenance philosophy means every component is designed to be replaceable, and building it once is the fastest way to learn that. Buy assembled if you want to be printing the same day you unbox it.

Prusa Core One or Bambu Lab P2S?

Buy the P2S if speed and value are what you're optimizing for — it's 599 dollars, meaningfully faster, and has a comparable build volume. Buy the Core One if you want a printer engineered for a decade of field maintenance, fully open-source firmware independent of any one company's cloud ecosystem, and Prusa's long-standing support and community infrastructure. The Core One's premium is a bet on repairability and openness, not raw print speed.

Does the Prusa Core One need manual calibration?

No. Automatic bed leveling, input shaping, and pressure advance calibration all run without manual tuning, which is a meaningful change from earlier Prusa machines that leaned on manual first-layer calibration. Combined with the Nextruder direct-drive extruder, the Core One is close to plug-and-play despite its open, field-serviceable design.