Supra

PROMPT

State the objective.

Plain language, hard constraints. Nothing is built yet.

PLAN

It plans before it builds.

The work decomposes into a parts manifest. Your constraints lock first.

BUILD

Parametric geometry, feature by feature.

Real CAD solids assemble part by part. Never a dead mesh.

VERIFY

It finds the failures first.

Clearance, walls, fasteners, fit, interference. Obvious failures auto-fix.

SIMULATE

Loads, heat, and flow, checked.

Structural and thermal behavior, before anything is cut.

SYSTEMS

Circuits, harness, firmware.

Wired to the exact hardware in the geometry.

STRATEGY

Variants ranked. Lightest that passes.

The design space swept, every candidate fully checked.

RELEASE

Release-ready, on the record.

STEP, STL, BOM, firmware, and the full verification ledger.

Model credits
01 / 08
skip the animation ↓

WHY SUPRA EXISTS

Our ultimate goal is to let everyone freely express their greatest imaginations and ambitions, and make them real.

Say it in your own words

Describe what you want in plain language, in your own language. You do not need to know CAD.

Get a part that works

Supra designs it, runs the engineering checks, and tells you which ones it could not run.

Make it real

Download it for your 3D printer, or as a STEP file for any CAD program.

Try it

Poke at the work.

Two small live models of what Supra's checks compute. Move them and watch the numbers change.

Simulation you can toggle.

Stress, thermal, and airflow on the same bracket. Switch the analysis and read the result off the part.

PEAK VON MISES227 MPaKt 3.73, finite width (Roark)

Grown, not drawn.

Fix the bracket at its bolt hole, load the free corner, and the optimizer keeps material only along the stress path, the way trabecular bone does (Wolff's law). Generate it, or scrub between the dense fill and the optimized result.

Dense fillOptimized
MASS-
STIFFNESS est-
PEAK STRESS est-illustrative model

Electronics

A board, routed and checked live.

An illustrative four-layer board that this page places, routes and rule-checks in your browser, step by step. In Supra, the boards you design in KiCad are checked against the part they mount in: holes, connectors, keep-outs and the parts list.

01 Outline · illustrative reference layout

Structures

Every system on one model.

An illustrative building: structure, envelope, services and power drawn on one model, with representative values. Switch systems and read each off the building.

Illustrative building model, representative values

CAD. Checks. DFM. BOM. Firmware. Docs.

Hardware still ships through a maze.
Supra makes it one loop.

  1. 01

    State intent

    Objective, constraints, what done looks like, in plain language.

  2. 02

    Plan

    Supra proposes the steps and asks only what's critical. Nothing builds until you say so.

  3. 03

    Build

    Editable, parametric geometry, never a dead mesh. Sized to real components' datasheet dimensions.

  4. 04

    Verify

    Fit, clearance, printability, interference. Failures surface in seconds, the obvious ones fix themselves and get re-checked.

  5. 05

    Release

    STEP, STL, BOM, firmware, build guide, revision notes. A design state you can hand to reality.

Everything between
intent and reality.

Point tools optimize one step. Supra owns the whole path, and every claim it makes is labeled estimated or validated.

Plan-first agent

Supra shows its full plan, constraints, assumptions, open questions, before a single feature is built. One-click approve or revise.

Parametric build

Prompt-to-parametric parts on a real BREP kernel. Editable dimensions with typed bounds, exact STEP + STL export. Never a dead mesh.

Verification ledger

Every check records its method, measured value, assumptions, and residual risk. Trust through visibility, we underclaim on purpose.

Real-fit checks

Fastener clearance against ISO 273 tables, part-to-part interference by boolean volume, wall thickness, overhang, printer envelope.

Assemblies that mate

Multi-part designs with per-part parameters and placements, pairwise interference-checked so parts fit before you build them.

Variants explorer

Sweep the design space, fully check every candidate, rank by weight, apply the winner as a new tracked version.

Real component library

NEMA 17, SG90, MG996R, 608ZZ, Raspberry Pi, Arduino, 2020 extrusion, exact datasheet dimensions injected so mounts fit the real part.

Systems & firmware

Wiring plans with power warnings, and firmware scaffolds generated to match the hardware they move, compile-checked once you enable the toolchain bridge.

Researched concepts

Before sizing anything, Supra weighs at least three working principles and, on Anthropic models, looks up prior art, datasheets and standards. A number taken from a page must cite a page it actually read, or it stays a labeled assumption.

Version control for hardware

Commits, branches, releases, and engineering-aware diffs: Δ mass, Δ clearance, Δ check status. Not file bytes.

Self-improving

Every generation is archived; verified builds become learned examples; real-world build reports feed back in. Supra gets better from use.

Sandboxed generation

AI-written geometry code passes an import and syntax guard before it runs, then executes in its own process with your API keys stripped and a hard timeout. Shared deployments can require a network-less container.

Download the free beta →

The pain we remove.

Hardware teams lose most of their calendar to hand-offs, rework, and unverifiable claims. Supra deletes the loop's dead time.

THE OLD WAY
WITH SUPRA
Weeks of CAD iteration for every revision
Parametric rebuilds from a sentence
Simulation queued behind specialist backlogs
First-order load and heat screens, clearly not FEA
Fit and clearance errors discovered at assembly
Interference caught before anything is cut
Tribal knowledge, no audit trail on decisions
Every check and assumption on the ledger
Mechanical, electrical, and firmware in silos
One loop wires the harness to the exact geometry
DFM surprises when the factory quotes the part
Printability and machinability screened up front

Shipping today, on the record.

Not a roadmap. These run in Supra right now, every result labeled estimated or validated.

Structural sanity

Mesh cross-section bending and axial stress, safety factors against real material yield, deflection estimates on every load case.

Thermal margin

Steady-state hot-spot estimates with conduction plus convection paths, checked against material service limits.

Motion sanity

Mechanism degree-of-freedom analysis and travel interference hints before anything is printed.

Trade studies

Latin hypercube sweeps, Pareto fronts, and parameter sensitivity with a knee-point recommendation.

Release packages

BOM, revision notes, assembly sequence, compliance checklist, and sha256-stamped artifacts in one call.

Merge gates

Pull requests for hardware: a design with failing checks cannot merge, and the gate shows its evidence.

Lives inside real CAD.

Supra isn't a walled garden. It works with the open CAD stack you already trust, both directions.

WORKBENCH

A copilot panel inside FreeCAD

Type intent in a dock panel; parts and placed assemblies appear in your active document as real solids. Edit dimensions in the panel, the model rebuilds in place, fully re-checked.

TWO-WAY

Round-trip your edits

One click opens any part in FreeCAD. Push and pull with mature CAD tools, export STEP, import it back, Supra tracks it as a new version with an engineering diff against the original.

OPEN FORMATS

STEP-first, always

Exact BREP geometry any engineer can open, plus STL for the printer. Your designs are never trapped in a proprietary blob.

Five layers. One workspace.

Not a chatbot in CAD. Not a prompt-to-mesh toy. A coordinated engineering system.

L1

Build

Prompt-to-parametric parts and assemblies. Templates, standard components, dimension-aware edits.

L2

Check

Printability, fit and clearance, assembly sanity, structural and thermal estimates, honestly labeled.

L3

Release

Manufacturing exports, BOMs, build guidance, revision notes. A design state you can hand off.

L4

Systems

Motion sanity, actuator mapping, wiring guidance, firmware scaffolds, for products that move.

L5

Collaboration

Commits, branches, reviews, releases, plus publish, fork, and remix for the community.

Review hardware like code.

Branch a design into lighter, cheaper, stronger. Diff it in engineering terms, mass, clearance, printability, margin, not file bytes. Gate the merge on checks.

GITHUB, FOR MACHINES.

example · compare  main ← chassis/lighter-v2
Mass412 g → 338 g −18%
Clearancebattery bay +2.4 mm ✓
Printabilityoverhang 6.2% → 2.1% ✓
Fastener fitM5 @ ISO 273 ✓
BOM27 → 24 items
checks 8/8 pass, merge readymerge gated on checks
illustrative diff, real diffs are computed from your design's geometry and checks

What we won't pretend.

Credibility is the product. Supra is engineered to underclaim.

SUPRA DOES

  • Exact geometry, exact clearances, exact interference volumes
  • Honest heuristics for printability, labeled as heuristics
  • Auto-fixes that are re-verified, never assumed
  • A ledger of every assumption and open risk

SUPRA WON'T

  • Claim simulation truth it hasn't earned, estimates are labeled estimates
  • Replace physical testing, it tells you which test to run first
  • Ship silent failures, every error is loud, logged, and on the record
  • Take the human out of safety-critical decisions

From first build to funded fleet.

These are illustrative scenarios written from our target workflows, not real customer quotes. Yet. Early access is how that changes.

“I built something real, and I barely knew CAD.”

SCENARIO · FIRST-TIME BUILDER

“Three branches explored by lunch. We used to manage one a week.”

SCENARIO · ROBOTICS STARTUP

“We now review hardware changes the way we review code.”

SCENARIO · HARDWARE TEAM LEAD

Get Supra

Free beta for Windows and Mac. CAD artifacts and project history stay local by default. AI requests send the prompt and selected engineering context to the model provider you configure.

Download for WindowsDownload for Mac

Windows 10/11 x64 or macOS Apple silicon

INSTALL · THREE STEPS
  1. 1run the Windows setup or open the Mac DMG
  2. 2launch Supra and add one key: an OpenAI API key runs the default agent, GPT 6 Astra, and an Anthropic API key runs Opus 5.5 or Fable 5.1. Either one is enough to start
  3. 3describe your first part, Supra plans it, builds it, and verifies it

Downloads come straight from Supra's public releases on GitHub. No account is needed.

Intel Mac? download the Intel version · Linux builds are coming → hello@silviaai.dev

Every file's SHA-256 is listed on the GitHub release.

Mac first launch blocked by macOS? how to allow it

founding engineers → careers@silviaai.dev
investors → hello@silviaai.dev

BEFORE YOU DOWNLOAD · AGREEMENT REQUIRED
Supra can be wrong. It is not a licensed engineer, safety authority, certification, or approval to manufacture. A qualified human must independently review, test, and authorize every consequential design.