Anycubic Kobra S1 Review 2026 — A Serious Challenger to the Bambu P1S

The Anycubic Kobra S1 is not a budget printer with aspirations. It is Anycubic's deliberate move into the enclosed CoreXY tier — the segment dominated by Bambu Lab's P1S and, to a lesser extent, the Creality K1. At around $499 standalone and $799 with the ACE multi-color system, the Kobra S1 lands at a price point that demands a real conversation about whether Anycubic has actually caught up, or just gotten closer.

After extensive use across PLA, PETG, ABS, ASA, and PLA-CF, here is an honest assessment.

Specs at a Glance

Specification	Anycubic Kobra S1
Build Volume	250 × 250 × 250 mm
Max Print Speed	600 mm/s
Motion System	CoreXY, enclosed
Extruder	Direct drive (Bowden hybrid)
Max Nozzle Temp	300°C
Max Bed Temp	110°C
Auto Calibration	Yes (input shaping, flow, vibration compensation)
Filament Sensor	Yes
Connectivity	Wi-Fi, USB
Supported Materials	PLA, PETG, ABS, TPU, ASA, PLA-CF
Price (standalone)	~$499
Price (with ACE)	~$799

Build Quality and First Impressions

The Kobra S1 ships mostly pre-assembled. You are attaching the top gantry section, connecting a handful of cables, and running the initial calibration sequence — roughly 20 to 30 minutes of actual work. Anycubic includes all necessary tools and the instructions are clear enough that you will not need to look anything up.

The enclosure is a notable step up from Anycubic's previous open-frame models. The panels are solid, the frame is rigid, and the printer does not flex when you push on it. The door has a satisfying magnetic latch. The touchscreen is responsive and the menu layout is logical — calibration, temperature, print history, and settings are all where you would expect them to be.

The direct drive extruder is well-mounted, with no wobble or play. The heated bed is PEI-coated and heats evenly. First-layer adhesion on PLA and PETG is excellent right out of the box with no glue stick required.

One thing to note: the Bowden hybrid approach — direct drive with a short Bowden buffer — is a design compromise that Anycubic uses to manage weight at higher speeds. It works well for most materials, though TPU requires slower speeds than a fully direct drive setup would need.

Print Quality

Out of the Box

The Kobra S1's auto-calibration routine runs input shaping, flow calibration, and vibration compensation before the first print. This is not just a bed-leveling pass — it adapts the motion profile to the specific machine. The result is that the default profiles produce genuinely good prints from the start.

PLA at 200 mm/s produces clean surface finish with accurate dimensions. Overhangs up to about 55 degrees come out well without supports. Layer lines are consistent and the finish on vertical walls is smooth. Stringing is minimal with default retraction settings.

PETG requires slightly more tuning — dropping temperature by 5°C and adding a small retraction adjustment eliminates most stringing. Out of the box it is acceptable; after 30 minutes of adjustment it is clean.

With Tuning

Once you dial in material-specific profiles, the Kobra S1 holds its own against printers in a higher price bracket. Dimensional accuracy is tight — parts designed to fit together do fit. The input shaping suppresses ringing artifacts well at speeds up to around 350 mm/s, which is where most users will realistically run it.

ABS and ASA benefit significantly from the enclosed chamber. Warping is effectively eliminated for parts up to the full 250mm bed size. Layer delamination — a chronic problem with ABS on open-frame printers — does not appear in enclosed prints. The enclosure heats passively to around 40°C during extended prints, which is adequate for ABS and ASA without active chamber heating.

PLA-CF (carbon fiber reinforced PLA) prints well at 220°C with a hardened nozzle. The stock nozzle is not hardened, so PLA-CF printing will wear it out over time. Factor in the cost of a replacement hardened nozzle if you plan to print CF materials regularly.

For tuned settings, see our Anycubic Kobra S1 settings guide.

The ACE Multi-Color System

The ACE (Anycubic Color Engine) system is an optional add-on that turns the Kobra S1 into a multi-material printer. At $799 for the combo, you are paying $300 above the standalone price for multi-color capability — slightly less than the $300 premium Bambu charges for the P1S Combo over the P1S alone.

How It Works

The ACE Pro holds four spools and connects to the printer via a PTFE tube. When the print needs a color change, the ACE Pro retracts the current filament, drives the new color forward, and the printer performs a purge before continuing. Color transition time runs approximately 15 to 25 seconds per swap, consistent with the Bambu AMS.

The standout feature is active filament drying, built directly into the ACE Pro unit. The drying chamber maintains temperatures between 35 and 55°C with a timer up to 24 hours. This is a genuine advantage over both the Bambu AMS and the Creality CFS — neither of which includes active drying. If you regularly print PETG, Nylon, or ASA in multi-color configurations, moisture-absorbed filament is a real reliability problem. The ACE Pro addresses it without requiring a separate dryer.

ACE vs Bambu AMS vs Creality CFS

Feature	Anycubic ACE Pro	Bambu AMS	Creality CFS
Max Colors (single unit)	4	4	4
Active Filament Drying	Yes (35–55°C)	No	No
Built-in Cutter	Yes	Yes	Yes
Waste Tower Required	Yes	Yes	Yes
Filament Compatibility	PLA, PETG, ABS, ASA, PA, PC	PLA, PETG, ABS (limited)	PLA, PETG
Price (with printer)	~$799	~$899 (P1S Combo)	~$599 (K1 Combo)

The Bambu AMS has a more mature software implementation and fewer edge cases in practice. Color transitions are slightly cleaner on the P1S Combo after firmware updates have refined the purge algorithm over the past two years. The ACE Pro is catching up, but the Bambu system has more real-world miles on it.

The Creality CFS is cheaper but limited — it works reliably with PLA and struggles with PETG and anything more technical. If material versatility matters, it is not a serious competitor here.

The ACE Pro's real-world differentiator is the drying. If you are printing PETG or ASA in multi-color — which the P1S's AMS handles with mixed results anyway — the ACE Pro's drying capability is a genuine win.

Waste and Purge

Expect 4 to 9 grams of filament waste per color transition. Dark-to-light changes require more purge volume. For a 4-color decorative print with frequent swaps, waste adds up to 30–60 grams over a full build plate — similar to the Bambu AMS on comparable prints. Factor this into filament costs on multi-color projects.

Speed and Reliability

The Kobra S1 advertises 600 mm/s maximum speed. As with most printers in this class, 600 mm/s is a benchmark number, not an operating speed. Real-world print quality at 600 mm/s is noticeably degraded — surface artifacts, some dimensional deviation, and occasional layer skip warnings on large flat sections.

The practical sweet spot is 250 to 350 mm/s for most prints. At 300 mm/s with quality profiles, a standard Benchy prints in about 22 minutes. A 200mm functional part that would have taken 5 hours on a bed slinger completes in under 2 hours.

Reliability is where the Kobra S1 compares well to its predecessors but falls slightly behind the P1S in raw track record. Multi-day prints complete without incident on good filament. The filament sensor works reliably. Power loss recovery is implemented and has functioned correctly in testing.

The main reliability concern is the ACE Pro unit during long multi-color prints. Filament sensor false positives during color changes and occasional failed retractions appear in community reports. These are edge cases rather than constant problems, but they happen more frequently than on the P1S's AMS in current firmware. Anycubic has been updating firmware regularly, and the situation has improved since launch.

Material Compatibility

The enclosed chamber is the primary enabler here. The Kobra S1 handles materials that open-frame printers struggle with:

PLA: Works well, but like the P1S, you will get better overhangs and fewer stringing issues with the door slightly open during printing. Full enclosure for PLA can raise chamber temperature enough to cause subtle print quality issues on long prints.

PETG: The enclosed chamber reduces draft and temperature fluctuation, which helps with layer adhesion and surface quality. Performs consistently at 240°C nozzle, 80°C bed.

ABS: This is where the enclosure earns its place. ABS prints on the Kobra S1 with no warping on parts up to the full build volume. Fumes are partially contained — the enclosure is not sealed, and there is no HEPA filter in the base model. Add a filter if you are printing ABS in a living space.

ASA: Similar to ABS behavior. UV-resistant ASA parts intended for outdoor use print cleanly without layer delamination.

TPU: The Bowden hybrid design handles standard TPU (90A–95A shore hardness) at 30–40 mm/s. Softer TPU variants (85A and below) can be unreliable due to the Bowden section of the hybrid path. A fully direct drive setup handles soft TPU better.

PLA-CF: Prints cleanly at 220°C with a hardened nozzle. Replace the stock nozzle before printing any CF or abrasive materials regularly.

Anycubic Kobra S1 vs Bambu P1S vs Creality K1

Feature	Anycubic Kobra S1	Bambu Lab P1S	Creality K1
Price (standalone)	~$499	~$599	~$399
Build Volume	250×250×250 mm	256×256×256 mm	220×220×250 mm
Max Speed	600 mm/s	500 mm/s	600 mm/s
Enclosure	Yes	Yes	Yes
Auto Calibration	Yes (full)	Yes (full)	Yes
Touchscreen	Yes	No (small LCD)	Yes
Camera	No (base model)	Yes (720p)	Yes (720p)
Multi-color add-on	ACE Pro (~$300)	AMS (~$300)	CFS (~$200)
Active filament drying	Yes (ACE Pro)	No	No
OrcaSlicer support	Yes	Yes	Yes
Build platform	PEI coated	PEI coated	PEI coated
Ecosystem	Open	Semi-proprietary	Open

Where the Kobra S1 Wins

The $100 price advantage over the P1S is meaningful. The touchscreen is better than the P1S's small LCD — day-to-day use is more pleasant. The ACE Pro's active drying beats Bambu's AMS for multi-material reliability on moisture-sensitive filaments. And the ecosystem is more open — Anycubic does not use RFID filament tags or nudge you toward proprietary materials.

Where the Bambu P1S Wins

The P1S has two years of firmware maturity on the Kobra S1. The AMS, while not perfect, has been refined over many updates and its edge cases are well-documented in the community. The P1S's community is substantially larger — troubleshooting resources, tuned profiles, and community-tested material settings are more available. The P1S's camera is a small but useful feature for overnight print monitoring that the base Kobra S1 does not include.

Where the Creality K1 Fits

The K1 is cheaper and has a comparable enclosed CoreXY architecture, but its build volume is smaller (220mm bed), and the CFS multi-color system is limited to PLA and basic PETG. If budget is the primary constraint and material versatility is not critical, the K1 is a reasonable entry point. For anyone serious about engineering materials or multi-color, the K1's limitations show up quickly.

Software

The Kobra S1 uses AnycubicSlicer, which is forked from OrcaSlicer. It is a competent slicer with a familiar interface for anyone coming from OrcaSlicer or PrusaSlicer. Multi-color painting, support generation, and tree supports all work correctly. The Kobra S1 profiles are included by default.

OrcaSlicer itself also supports the Kobra S1 with community-maintained profiles. These profiles, in many cases, are more refined than the stock AnycubicSlicer defaults — particularly for PETG and ABS. Using OrcaSlicer directly is a recommended step once you are past the initial setup phase.

Wi-Fi print sending works reliably over a stable local network. The initial connection setup is simple — scan the QR code, enter your password, and the printer appears in the slicer. Unlike some Klipper-based machines, there is no manual IP configuration required.

AnycubicSlicer does not enforce any vendor lock-in. Standard G-code files from any slicer print without issue. There is no proprietary format requirement, no license key, no login requirement to slice.

Cloud and Privacy

Anycubic offers a cloud platform for remote monitoring and print management. It is entirely optional. The Kobra S1 operates fully offline over local Wi-Fi or USB — there is no mandatory account creation, no cloud dependency for slicing, and no telemetry requirement to unlock features.

This is a meaningful distinction from Bambu Lab's ecosystem, which has historically tied some features to cloud connectivity and has faced community criticism over telemetry and ecosystem control. The Kobra S1's open approach is a genuine advantage for users who want their printer to stay on their local network.

That said, Anycubic's cloud platform itself is less mature than Bambu's. Remote monitoring and push notifications work, but the interface is functional rather than polished, and the mobile app has received mixed user reviews.

Who Should Buy the Kobra S1

Buy the Kobra S1 if:

• You want an enclosed CoreXY printer at a lower price than the P1S and are willing to spend some time on tuning.
• You plan to add the ACE Pro multi-color system and print PETG, ABS, or ASA in multi-color — the active drying is a real advantage here.
• You prefer an open ecosystem without proprietary slicer lock-in or cloud dependency.
• You want a touchscreen on your printer and find the P1S's button-only interface frustrating.

Skip the Kobra S1 if:

• You want the most proven, community-supported enclosed CoreXY experience available — the P1S wins on maturity and troubleshooting resources.
• You primarily print PLA in single color — an open-frame printer like the Kobra 3 or Bambu A1 is cheaper and not worse for this use case.
• You want built-in camera monitoring — the base Kobra S1 does not include one.
• Soft TPU (85A and below) is a regular material for you — the Bowden hybrid path is a limitation here.

Final Verdict

The Anycubic Kobra S1 is the most credible challenge Anycubic has mounted against the Bambu P1S. The hardware is solid, the print quality is competitive, and the ACE Pro's active filament drying is a differentiator that Bambu has not matched. At $499 standalone and $799 with multi-color, the price positioning is aggressive.

What holds it back is a maturity gap. The Bambu P1S has been through two years of firmware updates, community profiling, and real-world edge case resolution. The Kobra S1 is still accumulating that history. Multi-color reliability is good but not yet at P1S levels. OrcaSlicer community profiles are still developing.

If you are buying in 2026 and willing to accept that some rough edges will smooth out over the coming firmware cycles, the Kobra S1 offers compelling hardware at a fair price. If you want the most reliable out-of-box experience and a large community to draw on, the P1S is still the safer choice — though you will pay $100 more for it.

Either way, the enclosed CoreXY segment is genuinely competitive now. That is good for everyone.