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.
Full details →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.
Full details →| Anycubic Kobra S1 Max | Prusa Research MK4S | |
|---|---|---|
| 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 |
| Materials | PLA, PETG, ABS, ASA, TPU, PA, PA-CF, PC, PLA-CF, PETG-CF, PET-CF, PVA | PLA, PETG, ABS, ASA, TPU, PA, PC |
| 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) |
One of the largest enclosed build volumes in the prosumer/professional tier — suited for large engineering parts, architectural models, and batch production.
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.
The S1 Max extends the Kobra ecosystem into the large-format enclosed segment, enabling Anycubic users to scale up without switching brands.
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.
Firmware, PCB schematics, hardware designs, and slicing profiles are all published under open licenses. You own the printer completely.
Prusa's forum, knowledge base, and repair guides are unmatched. Parts are stocked and available for years after purchase.