That promise has attracted an enthusiastic early review. TechRadar’s H1 calls it “Prusa CORE One+ INDX 8-Tool 3D printer review: This beast makes rival multicolor 3D printers feel slow.” Its subheadline is different: “Prusa’s 3D printer has changed the way I print and think about printing.” The distinction matters because the review contains a compelling real-world result, but not a controlled basis for declaring a universal speed winner.
For Windows-based makers, the more useful conclusion is practical: INDX may materially improve jobs with frequent tool changes, but early firmware and nozzle questions mean it should be approached as a promising, still-maturing platform rather than an unattended production appliance.
Why INDX is different from a typical multicolor printer
Prusa began shipping the first standard INDX conversion kits on August 20, 2026, and opened orders that day for complete CORE One+ (Gen 2) INDX systems. Buyers can choose assembled or kit machines, with four- and eight-tool configurations.
The defining design is a single active print head that collects a passive tool when a particular filament and nozzle are required. Each passive tool retains its own filament path and nozzle; Prusa describes the active head as using contactless induction heating for the tool it picks up. The passive tools are designed without heaters, wiring, or electronics.
That architecture has an important workflow implication. Instead of pushing several filaments through one shared melt path, the system can keep each loaded filament associated with its own nozzle. In theory, this reduces the reload-and-purge overhead that can dominate a print with hundreds of color boundaries.
Prusa advertises roughly 12 seconds per material change and approximately 0.013 grams of waste per change. Those figures support the claim that INDX avoids a conventional purge or wipe tower in its normal workflow. They do not support calling the process zero-waste. Thirteen milligrams is very little compared with the material consumed by a substantial purge tower, but it remains nonzero and can add up in exceptionally change-heavy jobs.
The CORE One+ INDX is positioned for more than figurines and display models. Prusa lists an enclosed CoreXY design, a 248 × 205 × 270 mm build volume, chamber temperatures up to 55 °C, a 300 °C nozzle limit, and support for 1.75 mm filament without a spool-chip requirement. Those specifications are useful boundaries, not proof that every engineering polymer or abrasive composite has been equally validated for repeated use.
A dramatic speed result, with an essential limitation
The strongest early evidence for INDX’s potential comes from TechRadar’s dragon-print comparison. The review reported an estimate of 3 days and 10 hours for 14 dragons on a Bambu Lab H2C. It estimated 1 day and 35 minutes for nine dragons on the CORE One+ INDX, and said the INDX had completed 27 dragons by the time the H2C job finished.
That is a striking outcome for a workload likely to reward separate filament routes, low changeover waste, and the absence of a large purge tower. It illustrates a point that is easy to miss when comparing printer specifications: multicolor job time is not just nozzle movement and extrusion speed. It also includes every unload, reload, purge, prime, travel move, and sacrificial structure needed to manage color changes.
Still, it is one reviewer-run comparison with limited disclosed methodology, not a controlled cross-platform benchmark. It cannot prove that INDX is faster than every rival printer across different models, materials, layer heights, quantities, or color counts.
Prusa’s own comparison figures add useful context. They place INDX at roughly 12 to 16 seconds per tool swap, while listing about five seconds for the Snapmaker U1 and around two seconds for the Bambu Lab X2D. Those raw figures do not settle whole-job performance: different systems have different waste, priming, thermal, and tool-management behavior. But they do show why INDX should not be characterized as the machine with the universally shortest swap.
Its more defensible advantage is the whole workflow. A model with many changes may benefit enormously if it avoids repeated shared-hotend purging. A simple model with few color changes may see far less benefit. Buyers should evaluate their own files: the number of tool changes, waste from a competing approach, bed area lost to purge structures, and whether separate nozzles materially help the intended materials.
ColorMix creates visual shades, not blended polymers
INDX supports Prusa’s ColorMix feature in PrusaSlicer and EasyPrint. The name can give the wrong impression. ColorMix does not physically combine several polymers inside a hotend. It creates apparent intermediate colors by alternating the loaded filament colors in layers, more like 2D halftoning than mixing paint.
For decorative pieces, signage, character models, and display prints, that can broaden the apparent palette available from a limited set of loaded spools. The visual effect will depend on the colors chosen, model geometry, layer height, viewing distance, and lighting.
It should not be confused with a validated materials-engineering technique. Alternating filaments for a visual result does not establish strength, heat resistance, chemical compatibility, food-contact suitability, or long-term durability for a functional part. If a part matters mechanically, test the exact filament pair, geometry, and loading conditions rather than assuming that a multicolor result is also a qualified multi-material result.
Windows workflow: prepare in PrusaSlicer, then verify the printer
For a Windows PC owner, PrusaSlicer is the central workflow point because it is where ColorMix and the tool-assignment plan become part of the job preparation. The practical value of INDX will be clearest when the sliced project accurately reflects the loaded tools and when the user has thought through the purpose of each filament and nozzle before printing.
Do not make a long, multicolor job the first test after setup or a firmware change. TechRadar reported three weeks without a misprint after calibration, which is encouraging, but that is one unit over a limited period. A multi-tool machine adds docking, tool selection, filament routing, calibration, and firmware behavior to the normal risks of a long 3D print.
Before committing a Windows-sliced, overnight project, use shorter test jobs to verify the workflow end to end:
- Confirm that the project’s tool and filament choices correspond to what is physically loaded.
- Run a small model that forces repeated tool pickups, parks, and color changes rather than merely testing each tool once.
- Check the result for incorrect color assignment, missed transitions, poor first layers, and signs that a tool did not dock or park consistently.
- Complete the applicable printer calibration after initial setup, and repeat controlled tests following firmware updates.
- If the intended job uses flexible, special, or abrasive materials, test those combinations separately before combining them with a long multi-tool print.
These precautions are not evidence that every INDX unit will fail. They are sensible risk control for an early-generation system where a failed job can consume days of machine time and multiple spools of filament.
Firmware caution: treat the early known-issues list accurately
The first public INDX firmware release listed known issues involving tool pick or park failures, parking in an occupied dock, single-tool auto-load behavior, flexible and special materials, spontaneous INDX-head resets, phase-stepping and input-shaper calibration, and filament-stuck detection.
That list should be read carefully. It documents concerns in the first public INDX firmware release; it does not establish that every issue remains in every later firmware version or affects every owner. Independent reporting also said that some early user problems were addressed in a firmware update.
The buyer-relevant point is therefore narrower than “INDX is unreliable.” Its early software history makes broad reliability claims premature. A reviewer’s successful three-week run is a useful signal, while the documented early issue categories show why fleet-scale reliability and long-term unattended operation remain unproven.
For makers comfortable with updates, calibration, controlled trial prints, and troubleshooting, that may be an acceptable early-adopter tradeoff. For a classroom, small business, or hobbyist who needs predictable output with minimal intervention, it is a reason to validate the complete workflow before relying on the printer for deadline-sensitive work.
The nozzle issue deserves more weight than the marketing language
The most consequential early hardware caveat concerns nozzle durability. Initial shipped INDX nozzles were nitrocarburized steel with surface treatment, reported at roughly 30 to 32 HRC. They were not truly hardened nozzles in the sense many users expect for sustained work with abrasive filaments.
Prusa’s product specifications identify the stock parts as surface-hardened nitrocarburized steel and provide finite wear expectations for abrasive-filament use. That does not mean the nozzles are unusable, nor does it prevent printing ordinary materials. It does mean buyers should be cautious about assuming they are equivalent to a genuinely hardened nozzle for routine carbon-fiber-filled, glass-fiber-filled, glow-in-the-dark, or similarly abrasive materials.
Independent reporting found that the problem delayed conversion-kit shipping while customer remediation was unresolved. It also reported Prusa’s wear observations: little wear after five kilograms of PETG-CF, but wear after 100 grams of highly abrasive UltraGlow. Those observations are valuable warnings, not a universal nozzle-lifespan formula. Wear depends on the material, filler, nozzle size, temperature, print settings, and manufacturer.
Dedicating one of eight tools to an abrasive filament can simplify filament management and avoid contaminating other tools. It does not change the wear properties of the nozzle in that dedicated tool. Buyers whose principal work is abrasive composite or glow material should seek clear, current nozzle and replacement-path information before treating INDX as a high-volume production answer.
Price and the buyer calculation
The independently corroborated September 1, 2026 launch MSRPs for the eight-tool complete system were $2,249 assembled and $1,949 as a kit. Current price and availability are calculated at checkout and vary by configuration and region.
The kit-versus-assembled decision is particularly meaningful here. A technically confident owner may accept the kit’s assembly and diagnostic burden. For a business or maker space where setup time, calibration, and troubleshooting have a direct cost, the assembled option may be the more rational purchase even at a higher list price.
INDX is most compelling for users whose work regularly contains enough color or material changes that purge waste, tool-change overhead, and lost build area become the dominant frustrations. It is less clearly persuasive for single-color functional printing or occasional two-color projects. It is also a qualified choice for abrasive-heavy work until the nozzle path is clearer.
An important architecture, not a settled champion
The CORE One+ INDX makes a credible case that multicolor printing can improve more through a different tool architecture than through ever-shorter swap times. Dedicated filament paths and passive tools can sharply reduce the purge-tower penalty of a shared-hotend approach, and the TechRadar comparison suggests that this can produce exceptional whole-job gains on the right models.
But the evidence supports a focused verdict, not an absolute one. INDX’s speed advantage is workload-dependent rather than universally benchmarked. ColorMix expands visual possibilities but does not blend polymers. The initial nozzle limitations and the known issues documented for the first public firmware release are material early-adopter considerations.
For Windows users working through PrusaSlicer, the sensible path is to test the actual cycle—slice, tool assignment, calibration, repeated swaps, and material behavior—on small jobs first. If those tests match the intended production workload, INDX’s low-waste architecture could save substantial plastic, bed space, and time. The decision should rest on that verified workflow, not on a headline alone.