- Build volume
- 250 x 210 x 220 mm
- Multicolor
- Optional MMU3
- Enclosure
- No
Prusa Research Original Prusa MK4S
Reliable open frame Prusa with top print quality, kit or assembled
Researched by Riley Hart · updated Oct 27, 2026
We started tracking this price on Oct 27, 2026 and have not found a past sale price yet, so we cannot say if $999 is a good deal. Black Friday is Nov 27, 2026, 31 days away, when robots in this category usually get their biggest cuts. Get a price drop alert.
The MK4S is a proven open frame Prusa that prints very cleanly, runs quietly and can be bought as a kit for $709. It suits people who value print quality, repairability and support over the lowest price. Skip it if you want ABS without buying an enclosure or want multi color in the box.
Best for: quality focused makers who like to tinker. Skip if: you want an enclosure or multi color included.
Specs
- Build volume
- 250 x 210 x 220 mm
- Print speed
- No max speed published; Tom's Hardware measured 24 mm3/s volumetric flow with Prusament PLA
- Multi color
- Optional MMU3 upgrade
- Enclosure
- No, open frame; optional Original Prusa Enclosure
- Auto leveling
- Yes, automatic mesh bed leveling with a load cell sensor
- Max nozzle temp
- 290 C
- Heated bed
- Yes, up to 120 C
- Filament types
- PLA, PETG, Flex, PVA, PC, PP, CPE, PVB; ABS, ASA, HIPS, PA with the enclosure and filtration add on
3 year cost of ownership
- Robot
- $999
- Total
- $999
No subscription is needed and Prusa software is free. Filament spend depends on use, so no 3 year total is computed.
Status and safety
- US availability
- ● On sale
- Recalls
- No recall found as of 2026-10-27 (web search of cpsc.gov for Prusa Research)
- FCC authorized
- Not checked
- Company
- ● Active
- Warranty
- ● 1 year for buyers outside the EU, including the US (Prusa knowledge base)
Price history
Tracked dailyTracking started Oct 27, 2026 at $999.
Each day adds a point. Turn on a price alert to hear about drops.
Where to buy
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Pros
- Excellent print quality in reviews
- Very quiet in Tom's Hardware testing
- Kit option at $709
- Load cell auto leveling
- Free software and no subscription
Cons
- Costs more than Bambu printers of similar size
- No enclosure without an add on
- Multi color needs the paid MMU3
- Only a 1 year warranty in the US
What independent reviewers found
- Called it one of the best printers they have tested. Flow rose to 24 mm3/s with Prusament PLA, and a puzzle print took 2 h 59 min versus 3 h 23 min on a Bambu P1P with smoother parts that fit.
- Tom's Hardware
- Scored 30 of 30 in its print quality test with a combined dimensional error of 0.097 mm, and every Benchy in its multi print test finished. Noted the high price and open frame.
- TechRadar · 5/5
Spec history
Checked dailySpec tracking starts with the next daily check.
Email me when Original Prusa MK4S gets cheaper
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Questions buyers ask
Should I buy the kit or assembled?
The kit saves $290 on the Prusa store today. Tom's Hardware estimates the build takes about 8 hours.
Can it print ABS?
Prusa lists ABS, ASA, HIPS and PA only when using the Original Prusa Enclosure with the filtration add on.
Does it have Wi-Fi?
Yes. Prusa ships the ESP Wi-Fi module with the printer.