AI for CAD Tools

Claude + SolidWorks vs Leo AI: A Chatbot or an Engineering Solution?

Claude + SolidWorks vs Leo AI: A Chatbot or an Engineering Solution?

Claude + SolidWorks vs Leo AI: A Chatbot or an Engineering Solution?

Connecting Claude to SolidWorks makes a good demo. See why leading engineering teams choose Leo AI, the agentic platform for physical products.

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7 min read

Dr. Maor Farid

Co-Founder & CEO · Leo AI

Co-Founder & CEO · Leo AI

Mechanical Engineer & AI Researcher · Former Postdoc & Fulbright Fellow, MIT · Forbes 30 Under 30

Mechanical Engineer & AI Researcher · Former Postdoc & Fulbright Fellow, MIT · Forbes 30 Under 30

Maor Farid is the Co-Founder and CEO of Leo AI, the first AI platform purpose-built for mechanical engineers. He holds a PhD in Mechanical Engineering and completed postdoctoral research at MIT as a Fulbright fellow. A Forbes 30 Under 30 honoree and former AI researcher and Mechanical Engineer in an elite military intelligence, Maor leads Leo AI's mission to transform how engineering teams design better products faster.

BOTTOM LINE

The chatbot route has viral videos. Leo has paid enterprise deployments with engineering teams at Scania, NVIDIA, BMW, Bosch and the U.S. military, plus independent recognition: Gartner recognized Leo in its research on AI in design and engineering; G2 named it the #1 New Software globally and the #12 AI Tool worldwide for 2026, based on verified user reviews; and CB Insights placed it on the AI 100. One side has demos. The other has engineers who trust it with the work.

Short answer: connecting Claude or ChatGPT to SolidWorks gives you a chatbot that can click buttons in CAD. Leo AI is the first agentic platform for physical products. It takes engineering teams from requirements to a manufacturing-ready assembly. One makes a good demo. The other runs in production at Scania, NVIDIA, BMW, Bosch and the U.S. military.

A customer asked me last week: "Everyone is connecting Claude to SolidWorks now. What's the difference with Leo?"

First, it isn't everyone. The demos fill LinkedIn, and most come from hobbyists and solo creators. The best engineering teams aren't doing it, for two reasons. They won't run their IP through personal chatbot accounts and experimental plugins. And they know drawing faster in 3D doesn't ship the product sooner or prevent a single manufacturing mistake.

CAD is not engineering

When Bertrand Sicot ran SolidWorks, he measured how much time its most active users spent inside the CAD editor. It was under 8%.

The rest of the project is where time and money go: defining requirements, running calculations, choosing parts, checking standards, reviewing designs, and handing a product to manufacturing. That is where launches slip and expensive mistakes are made.

So a chatbot that sketches and extrudes faster is optimizing the smallest step. Your launch date doesn't move. Your error rate doesn't move. There's no business ROI. For more on this, see our guide to AI for mechanical engineering.

IN PRACTICE

One of our research engineers used to use ChatGPT. He verified answers in Leo, and now he's left ChatGPT because he can trust Leo more.

Team Lead, ZutaCore

The chatbot: a blind engineer

A SolidWorks MCP plugin lets a chatbot send commands to the CAD: sketch, extrude, fillet. What comes back is names and numbers as text. The chatbot can't see the geometry, and it knows nothing about your guidelines, past projects or the standards you design to. It's a blind engineer building from a text description. It builds what it's told, right or wrong.

The tools are early, too. The public SolidWorks plugins describe themselves as alpha or early access. Anthropic's own CAD connectors cover Autodesk Fusion and Blender, and launched as "an early step." We could not find a single published enterprise deployment.

That's fine for a weekend project or a quick concept model. Some call it vibe engineering. But nobody vibe-engineers a brake system, a flight-critical bracket or a 40-ton press. In automotive, aerospace and defense, and industrial machinery, a design mistake means scrapped tooling, recalls, or worse. Those designs need an engineer's rigor, and an AI built to that standard.

CAD is not engineering. Claude or ChatGPT with a CAD plugin is a chatbot; Leo AI is a solution from requirements to manufacturing.


The chatbot (Claude or ChatGPT + CAD plugin)

The solution (Leo AI)

What it is

A general chatbot that can run CAD commands

The first agentic platform for physical products, built by mechanical engineers

What it covers

CAD clicks, under 8% of an engineer's time

Requirements to a manufacturing-ready assembly

What it knows

Internet text. Blind to geometry and your context

A Large Mechanical Model trained on 1B+ CAD assemblies, plus your guidelines, projects and standards

Business impact

Faster clicks. Same launch dates, same mistakes

Mistakes caught before manufacturing, parts reused, know-how kept

Your IP

Personal AI accounts, plugins in alpha or early access

SOC 2 Type II, isolated per customer, never trained on your data

Track record

Viral demos, no published enterprise deployments

Paid deployments at Scania, NVIDIA, BMW, Bosch, U.S. military

Every serious profession picks AI built for it

We've seen this movie before.

  • Lawyers had ChatGPT and Claude. They chose Harvey and Legora. Harvey is now used by 80 of the top 100 US law firms.

  • Software developers had the same chatbots. They chose Cursor, which passed $3B in annualized revenue.

Harvey, Legora and Cursor all run on frontier models, including Claude. Professionals don't choose them for the model. They choose them because they were built by people from the profession, around the real workflow, with the context and trust a general chatbot can't offer.

Physical products are next. Leo is that platform for mechanical engineering.

Leo: the first agentic platform for physical products

Leo was built by mechanical engineers for the whole design workflow, not one step of it. Engineers use it from the first requirement to a full, manufacturing-ready CAD assembly: specs, calculations, part selection, CAD, design review and the handoff to manufacturing.

What makes that possible is what sits behind it. Leo's Large Mechanical Model was purpose-built for mechanical design and trained on over a billion high-fidelity CAD assemblies. It reads geometry the way an engineer does. Leo then works from your context: your guidelines, your past projects, your part library and the industry standards you design to. That is the knowledge a chatbot never sees.

Leo also uses frontier language models for conversation, so every time Claude or GPT improves, Leo improves with it. Manufacturing drawing generation and finite element analysis (FEA) simulations are already in use by Leo's design partners and beta testers, with general availability coming soon.

The numbers engineers report

The difference shows up as time and mistakes, measured by the engineers themselves. Xavier, a mechanical engineer at Glotech, said Leo caught in one minute a mistake that five engineers had missed, the kind of error that cost the team millions in recalls a month earlier. A vehicle systems engineering officer in a defense division compressed three weeks of analysis into 30 minutes, with sourced calculations he could trust. At Weatherford, a 100-year-old oil and gas company, the engineer leading AI adoption got back a production-ready, API-compliant design, full feature tree and all, that would have taken 16 hours of work, done in one.

Adoption follows the results. Scania started with a proof of value and expanded Leo to a full engineering department. At ZutaCore, a research engineer who used to double-check his work in ChatGPT dropped it once he trusted Leo more.

On the other side, there is no published enterprise data for Claude or ChatGPT running CAD through a plugin. The only number at that scale is the failure rate. MIT's 2025 study of enterprise generative AI found that 95% of pilots deliver no measurable business impact, almost always because the tools are never integrated into the real workflow. A plugin that clicks buttons in CAD is exactly that kind of tool.

What engineers say:

  • "Leo identified in 1 minute a mistake that five engineers couldn't find. A similar error last month cost us millions in recalls." Xavier, Mechanical Engineer, Glotech

  • "Three weeks of analysis, done in 30 minutes, with sourced calculations I can actually trust." Vehicle Systems Engineering Officer, defense engineering division

  • "When something is not feasible, it doesn't just go with it. It tells you the assumptions are wrong." Marcus Pettersson, Design Engineer, Scania

Leo: the first agentic platform for physical products

Leo was built by mechanical engineers for the whole design workflow, not one step of it. Engineers use it from the first requirement to a full, manufacturing-ready CAD assembly: specs, calculations, part selection, CAD, design review and the handoff to manufacturing.

What makes that possible is what sits behind it. Leo's Large Mechanical Model was purpose-built for mechanical design and trained on over a billion high-fidelity CAD assemblies. It reads geometry the way an engineer does. Leo then works from your context: your guidelines, your past projects, your part library and the industry standards you design to. That is the knowledge a chatbot never sees.

Leo also uses frontier language models for conversation, so every time Claude or GPT improves, Leo improves with it. Manufacturing drawing generation and finite element analysis (FEA) simulations are already in use by Leo's design partners and beta testers, with general availability coming soon.

The numbers engineers report

The difference shows up as time and mistakes, measured by the engineers themselves. Xavier, a mechanical engineer at Glotech, said Leo caught in one minute a mistake that five engineers had missed, the kind of error that cost the team millions in recalls a month earlier. A vehicle systems engineering officer in a defense division compressed three weeks of analysis into 30 minutes, with sourced calculations he could trust. At Weatherford, a 100-year-old oil and gas company, the engineer leading AI adoption got back a production-ready, API-compliant design, full feature tree and all, that would have taken 16 hours of work, done in one.

Adoption follows the results. Scania started with a proof of value and expanded Leo to a full engineering department. At ZutaCore, a research engineer who used to double-check his work in ChatGPT dropped it once he trusted Leo more.

On the other side, there is no published enterprise data for Claude or ChatGPT running CAD through a plugin. The only number at that scale is the failure rate. MIT's 2025 study of enterprise generative AI found that 95% of pilots deliver no measurable business impact, almost always because the tools are never integrated into the real workflow. A plugin that clicks buttons in CAD is exactly that kind of tool.

What engineers say:

  • "Leo identified in 1 minute a mistake that five engineers couldn't find. A similar error last month cost us millions in recalls." Xavier, Mechanical Engineer, Glotech

  • "Three weeks of analysis, done in 30 minutes, with sourced calculations I can actually trust." Vehicle Systems Engineering Officer, defense engineering division

  • "When something is not feasible, it doesn't just go with it. It tells you the assumptions are wrong." Marcus Pettersson, Design Engineer, Scania

Your IP stays yours

This is the first question every engineering leader asks, and the first reason serious teams say no to the chatbot route. A plugin on each laptop, tied to each engineer's personal AI account, is not something you can govern.

One defense engineering unit we work with had tried ChatGPT and Gemini. Every query had to be scrubbed of sensitive details first, on machines outside their secure environment. It wasn't usable. With Leo, they work inside that environment, with no scrubbing.

Leo is SOC 2 Type II certified. Each customer gets an isolated instance, and Leo never trains on customer data.

"Leo is SOC 2 certified and nothing leaves our secured environment, which cleared the procurement review without issues." Engineer, defense and space enterprise (1,000+ employees)

FAQ

Yes, through community and early-access MCP plugins that let a chatbot send commands to SolidWorks on one engineer's PC. They are early-stage tools, and we found no published enterprise deployments.

Claude with a SolidWorks plugin is a general chatbot that can run CAD commands. Leo AI is the first agentic platform for physical products: built by mechanical engineers on a Large Mechanical Model trained on 1B+ CAD assemblies, connected to your guidelines and standards, and used from requirements to a manufacturing-ready assembly.

No. Leo uses frontier language models for conversation, so it improves as they do. It adds what a chatbot lacks: CAD understanding, your company's engineering context, and enterprise security.

Yes. Leo is SOC 2 Type II certified, runs an isolated instance per customer, and never trains on customer data. It is used in defense engineering environments.

MIT NANDA, "The GenAI Divide: State of AI in Business 2025."

See Leo on your own design

From requirements to a reviewed assembly, live.

Bring one real project to a 30-minute demo. We take it from requirements to a reviewed, manufacturing-ready assembly, with your standards applied.

#1 New AI Software Globally - G2 2026

Enterprise-grade security

Trusted by world-class engineering teams

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G2 badges: Top 25 AI Products, 2026; Users Love Us; Top 25 Rookies of the Year, 2026
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#1 New Software

Globally

All Industries

#12 AI Tool

Worldwide

G2 2026

Contact us

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Boston, MA 02109

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Subscribe to our engineering newsletter

Be the first to know about Leo's newest capabilities and get practical tips to boost your engineering.

Need help? Join the Leo AI Community

Connect with other engineers, get answers from our team, and request features.

Gartner logo
G2 badges: Top 25 AI Products, 2026; Users Love Us; Top 25 Rookies of the Year, 2026
CB Insights logo
#1 New Software

Globally

All Industries

#12 AI Tool

Worldwide

G2 2026

Contact us

50 Milk Street

Boston, MA 02109

United States

Leo AI on LinkedIn
Leo AI on YouTube
Leo AI on Reddit
Leo AI logo

Subscribe to our engineering newsletter

Be the first to know about Leo's newest capabilities and get practical tips to boost your engineering.

Need help? Join the Leo AI Community

Connect with other engineers, get answers from our team, and request features.

Gartner logo
G2 badges: Top 25 AI Products, 2026; Users Love Us; Top 25 Rookies of the Year, 2026
CB Insights logo
#1 New Software

Globally

All Industries

#12 AI Tool

Worldwide

G2 2026

Contact us

50 Milk Street

Boston, MA 02109

United States

Leo AI on LinkedIn
Leo AI on YouTube
Leo AI on Reddit

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