The Anycubic Kobra S1 Max (professional) and Qidi Tech Plus4 (prosumer) come from different brands and sit in different tiers, so this is less a head-to-head than a question of how much printer you need. Note that the Plus4 has been replaced by the Plus5 and is no longer sold new. Both are enclosed CoreXY printers with 4-slot multicolor, a 600 mm/s rated top speed and automatic calibration. The Kobra S1 Max costs $100 more and gets you 65% more build volume and support for PLA-CF, PETG-CF and PVA; the Plus4 answers with extra engineering materials (PPS-CF).
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 →This printer is no longer sold new. It has been replaced by the Qidi Tech Plus5.
Best for: Makers and small businesses who need a large enclosed build volume for engineering materials at a prosumer price — particularly those printing PA-CF, ABS, and PC at scale. Look for clearance deals — the Plus5 is the current model.
Full details →| Anycubic Kobra S1 Max | Qidi Tech Plus4 | |
|---|---|---|
| Pricing | ||
| Starting Price | $799 | ★ $699 |
| Print Specs | ||
| Tier | Professional | Prosumer |
| Motion | CoreXY | CoreXY |
| Build Volume | ★ 350 × 350 × 350 mm | 305 × 305 × 280 mm |
| Max Speed | 600 mm/s | 600 mm/s |
| Multicolor | ✅ 4 slots | ✅ 4 slots |
| Enclosure | ✅ | ✅ |
| Auto Calibration | ✅ | ✅ |
| Open Source | ❌ | ❌ |
| Upgrade Kit | — | — |
| Buy Timing | ||
| Released | Nov 25, 2025 | Sep 20, 2024 |
| Cycle length | — | ~408 days |
| Cycle advice | Buy | Superseded |
| Deals advice | Buy | Clearance |
| Next model | — | — |
The Kobra S1 Max was released on Nov 25, 2025, 352 days ago. It is a first-generation product, so there is no earlier cycle to predict its successor from.
The Plus4 has been replaced by the Plus5 and is no longer sold new, so there is no release cycle left to time — any unit you find now is leftover or second-hand stock.
On timing alone, the Kobra S1 Max is the safer buy right now — it launched only 352 days ago, while the Plus4 has already been replaced by the Plus5.
Cycle and deal status as of November 12, 2026. See the launch calendar →
The Plus4 lists at $699 and the Kobra S1 Max at $799 — $100 apart, so the Kobra S1 Max costs 14% more.
Per litre of build volume, that works out to $19 for the Kobra S1 Max versus $27 for the Plus4 — so the pricier Kobra S1 Max actually gives you more build space per dollar.
Buy the Kobra S1 Max. The Plus4 has already been replaced by the Plus5 and is no longer sold new, so it is only worth considering at a clearance price. If the Plus4 appealed to you, the fair comparison today is the Kobra S1 Max against the Plus5.
Compare Anycubic Kobra S1 Max vs Qidi Tech Plus5 →
How we judge timing and deals: read our methodology →
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.
One of the largest build volumes in the prosumer enclosed category — 40% more printable area than the Bambu X1C at a lower price point.
The second-generation active heating delivers consistent chamber temperatures for PA, PA-CF, ABS, ASA, and PC with minimal warping across the full build plate.
Handles high-performance engineering composites including PA-CF, PET-CF, and PPS-CF without requiring a separate hotend upgrade.