Claude-Powered Build Sessions
Unlimited manual TinkerSpace editing is free for everyone. Token-backed AI builds power Claude’s reasoning for complex functional parts. Most users start with Hobbyist for assemblies and FEA. Maker adds the full planning workflow, and Engineer is there when the hardest geometry actually matters.
When the part has to be right the first time. Deep AI headroom for tight-tolerance, fit-critical work.
Maximum AI capacity — 10× Hobbyist — headroom for the hardest geometry and multi-part assemblies. Resets monthly. Manual CAD and exports are unlimited.
For people who build continuously. Full planning workflow, repair, and the device STEP enclosure generator.
Expanded AI capacity — 4× Hobbyist — for serious project work. Resets monthly. Manual CAD and exports are unlimited.
For weekend prints and one-off parts. Describe it, sketch it, scan it — get geometry that prints right.
Standard AI capacity for regular project work. Resets monthly. Parameter edits, manual CAD, and exports are unlimited.
A free account for the tools that don't use AI.
Manual TinkerSpace edits, templates, the free 3D-printing tools, and STL/STEP export. AI capacity starts on Hobbyist.
AI capacity is measured in tokens — the same unit Claude itself meters — so you pay for how much the AI actually works, not a flat per-click fee. Starting a new AI build, forking a design, an expired session, or a major rebuild draws on your monthly capacity; a simple bracket costs far less than a multi-part enclosure. Photo and scan-based builds draw extra capacity since they use vision models. Manual TinkerSpace edits, zero-AI workflows, parameter changes, templates, and file exports don't consume capacity — they're unlimited on every plan.
For AI generation, yes. To keep up with demand, AI builds are for paying members, starting with Hobbyist. A free account still gets manual TinkerSpace, templates, the free 3D-printing tools, and STL/STEP export of your saved designs.
Your AI capacity resets at the start of your next billing month. If you keep hitting the ceiling, the next plan up is built for exactly that — Maker carries 4× Hobbyist's monthly capacity, and Engineer 10×. Manual TinkerSpace work and exports never stop, on any plan.
Every paid plan builds with Claude Sonnet 5.5, Anthropic's model for geometry and design conversation, so a Hobbyist build and an Engineer build use the same builder, and a second model, Claude Opus 5.5, reviews each design. Plans otherwise differ in monthly AI capacity and unlocked workflows. Lightweight helpers, like the TinkerSpace assistant, use a smaller model (Claude Haiku 5.5).
Stress Testing is Finite Element Analysis: a simulation pass that estimates stress distribution, weak spots, and safety factors before you print. It is available on Hobbyist and above for iteration and print-risk reduction, not as certified structural engineering approval.
Free includes templates, manual TinkerSpace, and export workflows. Hobbyist adds the AI workflows — Describe It, Quick Prints, Enclose Device, Engineering with Claude, Studio AI Co-pilot, Design Personas, Multi-Part Assembly, FEA Stress Analysis, and import workflows. Maker adds Engineer a Design with AI, Device STEP enclosure generator, and Repair & Recreate. Engineer adds Studio Vision DFM Review. Organic shapes (vases, handles, figurines) are on every paid plan; like any build, they use AI capacity.
Yes, you can cancel your subscription at any time, in one click: Settings → Billing & data → Cancel subscription (or "Cancel subscription" in the site footer). You'll continue to have access until the end of your billing period.
Zero-AI workflows do not call Claude. Manual TinkerSpace editing, template instantiation, parameter edits, and direct CadQuery-style enclosure work run without spending AI capacity, so they remain unlimited for every tier including Free.
Free accounts get 5 saved projects. Hobbyist gets 15, Maker gets 50, and Engineer gets 100. Projects store your designs, chat history, script history, parameters, and exported files so you can pick up where you left off.
Yes. Every plan, Free included, exports STL and STEP, and exporting or downloading again never spends AI capacity. Organic, mesh-only parts export as STL. Importing STEP/IGES/3MF/OBJ files starts on Hobbyist. Your designs are yours to keep and print.
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