Text-to-CAD tools comparison 2026

I spent an entire Saturday trying to run the same prompt through every text-to-CAD tool I could find. The prompt was simple on purpose: "A rectangular mounting plate, 120mm by 80mm by 5mm, with four M5 clearance holes on a 100mm by 60mm bolt pattern, 10mm from each edge." Not complex. Not clever. The kind of part you'd model in Fusion 360 in about ninety seconds while your coffee is still warm. I wanted to see what came back from each tool when the input was identical and the expectations were reasonable.

What came back ranged from "actually pretty close" to "I'm not sure what I'm looking at." One tool returned a solid I could open and measure. Another returned something that resembled a mounting plate the way a drawing of a sandwich resembles lunch. A third generated a script instead of geometry. One just timed out.

So here's the honest text-to-CAD tools comparison 2026 edition, written by someone who actually opened every output file and tried to do something useful with it.

The field, such as it is#

There are not many real text-to-CAD tools. There are a lot of things calling themselves text-to-CAD that are actually text-to-mesh, text-to-script, or text-to-marketing-page. If you filter for tools that take a text prompt and return editable B-Rep geometry or at least parametric CAD output, the list gets short fast.

I tested six tools. Here's the summary before I get into the details.

Tool	Output format	Pricing	Best at	Worst at
Zoo.dev	STEP, glTF, OBJ, STL	Free tier (20 min reasoning), paid tiers available	B-Rep solids, API integration, mechanical parts	Complex geometry, assemblies, occasional dimension drift
AdamCAD	STL, SCAD	$9.99/mo (Standard), $29.99/mo (Pro)	Fast generation, parametric sliders, quick prototyping	Limited feature tree, no native STEP
CADAgent	Native Fusion 360	Free (bring your own Anthropic API key)	Real parametric history inside Fusion 360	Requires Fusion, API costs add up, early-stage reliability
CADGPT	AutoLISP/Python scripts	$199/year	CAD scripting assistance, automation	Not a geometry generator despite the name
CADScribe	STL, STEP	Free (early access)	Simple primitive parts, fast iteration	Anything beyond basic geometry, complex prompts fail
Vondy	DXF	Varies	Beginner 2D profiles	Not real 3D, limited geometry, no solid output

That table tells most of the story. The rest is texture.

Zoo.dev#

Zoo is the most complete dedicated text-to-CAD tool I've used. It runs on their own GPU-native geometric kernel, KittyCAD, and outputs real B-Rep geometry. That means when you open the STEP file in Fusion 360 or SolidWorks, you get actual faces and edges. You can select a surface, fillet it, measure it, send it to a machinist. The geometry behaves like geometry.

My test prompt came back with a plate that measured 120.0 by 80.0 by 5.0mm. The holes were the right diameter. The bolt pattern was correct. I have had worse results from Zoo on other tests, dimensions off by a few percent, fillets that didn't survive the import, internal faces that shouldn't exist. But for a straightforward rectangular plate, it nailed it. The free tier gives you 20 minutes of reasoning time per month, which is enough to run a few dozen simple prompts and see if the tool works for your use case.

The API is the real selling point for anyone building a workflow around this. There's a Python SDK, proper documentation, and per-second billing at $0.0083/second after the free credits. If you're a developer integrating text-to-CAD into a product or automation pipeline, Zoo is currently the only serious option. I've written more about it in the Zoo text-to-CAD review.

Where Zoo falls apart is complexity. Ask for a gear, a snap-fit enclosure, or anything with interdependent features and the results go from "useful starting point" to "interesting art project." That's not unique to Zoo, it's the state of the whole field, but it's worth knowing before you expect miracles.

AdamCAD#

AdamCAD takes a different approach. You type your description, it generates a model, and then it gives you parametric sliders to adjust dimensions after the fact. That's a smart design decision. Instead of trying to get every dimension right on the first pass, it lets you tweak height, width, hole diameter, and spacing in real time without re-prompting.

The Standard plan at $9.99/month gets you 100 generations per week. Pro at $29.99/month gives you effectively unlimited generations and a direct line to the founders, which at this stage of the product probably matters more than the extra generations.

My test plate came back quickly, maybe five seconds. The dimensions were approximate, close enough for prototyping, not close enough for manufacturing. The parametric sliders let me correct the bolt pattern spacing, which was off by about 3mm initially. Export options are STL and SCAD, which means you're getting either a mesh or an OpenSCAD script. No native STEP export, which limits how useful the output is for engineering workflows. If you mostly need geometry for 3D printing, AdamCAD is genuinely fast and convenient. If you need to import into SolidWorks and do real edits, you'll be converting formats and losing parametric data in the process.

CADAgent#

CADAgent is the most architecturally interesting tool in this comparison. It's an open-source Fusion 360 add-in that uses an LLM to generate modeling commands directly inside Fusion 360's environment. The output isn't a file you download. It's a real parametric model with actual feature history built inside your running instance of Fusion 360.

That matters. A lot. When Zoo generates a STEP file, you get geometry without history. When CADAgent generates a model in Fusion 360, you get a timeline you can roll back, a feature tree you can edit, sketches you can constrain. That's the difference between a snapshot and a living model.

You bring your own Anthropic API key, so the tool itself is free but you're paying for API calls. For my test prompt, it generated the plate correctly, placed the holes, and I could go into the sketch and adjust dimensions like any other Fusion 360 model. The experience felt closer to having a fast junior modeler than to using a separate generation tool.

The catch is reliability. CADAgent is early. It stumbles on prompts that require multiple dependent operations. It sometimes picks the wrong sketch plane or creates redundant bodies. And you need Fusion 360 running, which means you need a Fusion license. But the approach, generating inside a real parametric environment instead of exporting isolated geometry, is clearly the right direction. More on the broader workflow implications in the text-to-CAD guide.

CADGPT#

I'll be blunt: CADGPT is misnamed. It's an AI assistant for AutoCAD and compatible platforms, not a text-to-CAD geometry generator. You ask it to do something and it writes AutoLISP or Python scripts. That's useful if you want to automate repetitive tasks in AutoCAD, and the scripting capabilities are legitimately helpful for power users who spend their days inside AutoCAD's command line.

At $199/year, it's priced like a productivity tool, which is what it actually is. It includes chat-based assistance, code generation in multiple languages, a calculator, and reference manual lookups. It's a CAD companion, not a CAD creator. When I gave it my mounting plate prompt, it generated an AutoLISP script that would draw the plate inside AutoCAD. Technically accurate, but a fundamentally different thing than generating a STEP file from a text description.

If you work in AutoCAD daily and want AI-assisted scripting, CADGPT is worth looking at. If you want text-to-CAD in the sense of "I describe a part and get geometry back," this isn't it.

CADScribe#

CADScribe is free, browser-based, and generates models in about 10-15 seconds. For simple geometry, it works. My test plate came back looking roughly correct. The dimensions were close, the holes were there, and I could download an STL.

Where CADScribe breaks down is anything beyond primitives. I tried a follow-up prompt for a part with filleted edges and countersunk holes. It returned a "fail" model, which is at least honest about it. The iterative refinement works: I could tell it "make the holes 6mm instead" and it adjusted correctly. But the ceiling on complexity is low. Gears, airfoils, compound features: all beyond its current capabilities.

CADScribe feels like a tool that's early enough that judging it harshly seems unfair but recommending it confidently seems irresponsible. It's free, it's fast, and it handles the kind of geometry that would take you thirty seconds to model by hand. For anything that would take you thirty minutes to model by hand, which is where time savings would actually matter, it can't help yet.

Vondy AI CAD Generator#

Vondy generates DXF files, which means 2D profiles. It's aimed at beginners who need laser-cut or CNC-routed flat parts. For that narrow use case, it's fine. For 3D solid geometry, it's not in the conversation. I mention it because it shows up in text-to-CAD tool lists, but calling it text-to-CAD is generous. It's text-to-2D-profile, which is a different job.

What the comparison actually tells you#

The honest takeaway from testing all of these back to back is that the text-to-CAD tools comparison 2026 looks a lot like early smartphone comparisons in 2008. One or two tools are clearly ahead, a few are finding interesting niches, and several are more promising than they are useful.

Zoo.dev produces the most usable engineering output. If you need a STEP file you can open in professional CAD software and actually work with, Zoo is the tool. If you need an API, Zoo is the only real option. The free tier is generous enough to evaluate honestly.

AdamCAD is the fastest path from idea to something you can 3D print. The parametric sliders are a genuinely good idea that other tools should copy. The lack of STEP output limits its usefulness for engineering workflows.

CADAgent has the best architecture. Generating inside a real CAD environment produces better, more editable output than any standalone generator. It's just not reliable enough yet to recommend without caveats.

Everything else is either a different product (CADGPT writes scripts, Vondy makes 2D profiles) or too early to rely on (CADScribe handles only primitives).

None of these tools will replace your CAD skills. Every output I got needed some manual work before I'd send it to manufacturing. Dimensions to verify, features to add, geometry to clean up. The value is in the starting point, not the finished product. For a deeper look at how text-to-CAD fits into production work, the text-to-CAD for manufacturing post covers the gap between "AI-generated geometry" and "geometry a machinist won't send back."

If you're just getting started with text-to-CAD and want to understand what to expect, the best text-to-CAD tools overview covers each tool in more detail. And if you're wondering whether any of this is worth your time, here's my honest answer: for simple parts, yes. For complex parts, not yet. For staying aware of where the tools are heading, absolutely. The field is thin in April 2026, but the direction is clear, and the engineer who understands these tools early will have an advantage when they actually become good.