Anycubic Kobra S1 MaxvsPrusa Research MK4S

💰Anycubic Kobra S1 Max is $130 cheaper (16% less)

📐Anycubic Kobra S1 Max has 271% more build volume

⚡Anycubic Kobra S1 Max tops out at 600 mm/s vs 500 mm/s

🏠Only Anycubic Kobra S1 Max has an enclosure — required for ABS, ASA, PA engineering filaments

Cross-ecosystem comparison: These printers use different software ecosystems. Accessories, filament profiles, and community support are not interchangeable between brands. Consider the total ecosystem cost, not just the printer price.

Anycubic Kobra S1 Max

Buy/Wait:Buy

First-generation product — recently released, still early days

Best for: Professional makers and small studios who need large-format enclosed printing for engineering filaments at a competitive price — and want Anycubic's ecosystem over Creality or Qidi alternatives.

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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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	Anycubic Kobra S1 Max	Prusa Research MK4S
Pricing
Starting Price	★ $799	$929
Print Specs
Tier	Professional	Prosumer
Motion	CoreXY	BedSlinger
Build Volume	★ 350 × 350 × 350 mm	250 × 210 × 220 mm
Max Speed	★ 600 mm/s	500 mm/s
Multicolor	❌ No	❌ No
Enclosure	★ ✅	❌
Auto Calibration	✅	✅
Open Source	❌	★ ✅
Upgrade Kit	—	🔧 From MK4, MK3.5
Buy Timing
Released	Nov 25, 2025	Mar 20, 2024
Cycle length	—	~730 days
Cycle advice	Buy	Upgrade Kit
Deals advice	Caution	Buy
Next model	—	Prusa MK5 (Expected 2027)

Quick Winner

Bottom Line

💰Anycubic Kobra S1 Max saves you $130 — choose it if budget is your primary constraint

🏠Anycubic Kobra S1 Max is the only choice if you print ABS, ASA, PA, or PC — those materials require an enclosure

🔓Prusa Research MK4S is the pick for open firmware, community mods, and long-term repairability

Materials

Anycubic Kobra S1 Max only

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

PLA-CFCarbon-fibre PLA — rigid matte finish, more brittle

PETG-CFCarbon-fibre PETG — stiffer than PETG, easy to print

PET-CFCarbon-fibre PET — rigid, dimensionally stable

PVAWater-soluble support — dissolves for complex overhangs

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?

Anycubic Kobra S1 Max

350×350×350 mm large-format build volume

One of the largest enclosed build volumes in the prosumer/professional tier — suited for large engineering parts, architectural models, and batch production.

65°C active chamber heating at scale

Maintaining 65°C across a 350×350 mm chamber is a meaningful technical achievement — ensuring consistent results for ABS, ASA, and PA across the full build plate.

Anycubic ecosystem continuity

The S1 Max extends the Kobra ecosystem into the large-format enclosed segment, enabling Anycubic users to scale up without switching brands.

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.