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Describe a part.

5 agent builds a day on the free beta · sign in with GitHub · nothing to install

A real recorded session, cut to its key moments: the first build fails the thinnest-wall check, Claude finds the cause and rebuilds, all 10 checks pass. 3 min 17 s of work in 20 s.

22 / 22benchmark tasks solved, vs 20 / 22 for Claude Code with the text-to-cad plugin
~89 sper task on average
~$0.24per task at API prices
every buildmeasured: holes, walls, collisions, mass

The benchmark was run by eitri's authors, each task once, and the judge was also Claude: strong evidence, not independent proof. Source on GitHub and every check's verdict.

Describe, build and measure, fix

  1. 1

    Describe

    A part in plain language, the way you would tell a person.

    “mounting plate with four M4 clearance holes”

  2. 2

    Build and measure

    Claude writes the model and builds it. Every build comes back as measurements, not a guess.

    ✓holes4 found, ø 4.50 mm
    ✓envelope60.00 × 40.00 × 5.00 mm
  3. 3

    Fix

    A check that fails is fixed in the geometry. The agent cannot delete it.

    ✕thinnest wall0.28 mm, expected ≥ 2
    ✓thinnest wall3.2 mm, expected ≥ 2

Built with eitri

43 parts, 43 checks pass. One prompt, a 398-line model, from a recorded 23-minute session shown in 16 s.

Stretch the plate by hand, tell Claude to continue: it reads your edits, adds the holes, then builds a hook and writes new checks for it. $0.61 of API usage, a real session.

The print export dialog: the V8 engine kit decomposed into 43 printable parts on 2 plates

Export for printing: 43 printable parts on 2 plates, all written and verified in about 3 s.