First-generation product — recently released, still early days
Best for: Professional makers and small studios who need the maximum enclosed build volume in Qidi's lineup for large engineering parts, architectural models, or batch production — at a price point below the Bambu H2S.
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 →| Qidi Tech Max4 | Prusa Research MK4S | |
|---|---|---|
| Tier | Professional | Prosumer |
| Motion | CoreXY | BedSlinger |
| Build Volume | 390 × 390 × 340 mm | 250 × 210 × 220 mm |
| Max Speed | 800 mm/s | 500 mm/s |
| Multicolor | ✅ 4 slots | ❌ No |
| Enclosure | ✅ | ❌ |
| Auto Calibration | ✅ | ✅ |
| Open Source | ❌ | ✅ |
| Upgrade Kit | — | 🔧 From MK4, MK3.5 |
| Materials | PLA, PETG, ABS, ASA, TPU, PA, PA-CF, PC, PPS-CF | PLA, PETG, ABS, ASA, TPU, PA, PC |
| Released | Dec 1, 2025 | Mar 20, 2024 |
| Cycle length | — | ~730 days |
| Cycle advice | Buy | Upgrade Kit |
| Deals advice | Caution | Buy |
| Next model | — | Prusa MK5 (Expected 2027) |
The Max4 offers the largest build volume in Qidi's lineup — enabling large functional parts, architectural models, and production batch runs that exceed Plus4 capacity.
The Max4's closed-loop XY adds positional feedback for improved accuracy at high speeds — a differentiating feature at this price tier that reduces dimensional errors on large prints.
Qidi's proven active chamber heating technology scaled to a 390×390 mm bed — critical for consistent ABS, ASA, PA-CF, and PPS-CF results across the full build plate.
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.