The Bambu Lab A2L and Prusa Research MK4S are cross-brand rivals: both are prosumer-tier printers, listed $260 apart. Both are open-frame bed-slinger printers with a 500 mm/s rated top speed and automatic calibration. The MK4S costs $260 more and gets you extra engineering materials (ASA, PA and PC) and an open-source design; the A2L answers with 197% more build volume and 4-slot multicolor.
First-generation product — recently released, still early days
Best for: Makers who want the largest possible open-frame build volume on a budget — large cosplay, terrain, and functional parts — with optional multicolor via AMS Lite.
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 →| Bambu Lab A2L | Prusa Research MK4S | |
|---|---|---|
| Pricing | ||
| Starting Price | ★ $469 | $729 |
| Print Specs | ||
| Tier | Prosumer | Prosumer |
| Motion | BedSlinger | BedSlinger |
| Build Volume | ★ 330 × 320 × 325 mm | 250 × 210 × 220 mm |
| Max Speed | 500 mm/s | 500 mm/s |
| Multicolor | ★ ✅ 4 slots | ❌ No |
| Enclosure | ❌ | ❌ |
| Auto Calibration | ✅ | ✅ |
| Open Source | ❌ | ★ ✅ |
| Upgrade Kit | — | 🔧 From MK4, MK3.5 |
| Buy Timing | ||
| Released | Jun 1, 2026 | Aug 13, 2024 |
| Cycle length | — | ~730 days |
| Cycle advice | Buy | Upgrade Kit |
| Deals advice | Buy | Buy |
| Next model | — | — |
The A2L was released on Jun 1, 2026, 164 days ago. It is a first-generation product, so there is no earlier cycle to predict its successor from.
The MK4S was released on Aug 13, 2024, 821 days ago. Its previous release cycle ran about 730 days; it is now 91 days past that point and no successor has been announced.
On timing alone, the A2L is the safer buy right now — it launched only 164 days ago, while the MK4S is 91 days past its ~730-day cycle with no successor announced.
Cycle and deal status as of November 12, 2026. See the launch calendar →
The A2L lists at $469 and the MK4S at $729 — $260 apart, so the MK4S costs 55% more.
Per litre of build volume, that works out to $14 for the A2L versus $63 for the MK4S — the A2L is both cheaper and roomier, so it wins on value outright.
If you are buying before Dec 5, 2026, the active sale tips value toward the A2L.
Our pick for most buyers is the A2L, for a lower price ($260 less) and 197% more build volume, plus better buy-now timing. Go for the MK4S instead if you need ASA, PA and PC — they are on its materials list but not the A2L's. The A2L is also in a sale window right now (Bambu Black Friday 2026, until Dec 5, 2026).
How we judge timing and deals: read our methodology →
Bambu's largest bed-slinger build volume, big enough to print full-size helmets and large props in a single piece rather than in glued sections.
The A2L stores several calibration sets at different heights up the Z axis to keep the faint vertical banding of tall bed-slinger prints under control.
An add-on blade-cutting and pen module extends the A2L beyond printing for sticker cutting and plotting workflows.
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.