Free tool: runs in your browser
AI model dimension spot check logbefore you rely on a model an AI tool built or edited
TimeBinder adds a layer of protection against AI and human fraud and disputes. Add each dimension with where the expected number came from and the number in the model. You get pass or fail against your tolerance, a log and warnings.
Everything you type stays on this page. A pass shows two numbers match within your tolerance. It does not show the design is right, safe or compliant with any code, and it says nothing about dimensions you did not check. It is not professional advice.
Check your dimensions
Set a tolerance, add each dimension with its source, the expected number and the number in the model. Nothing you type is sent to TimeBinder.
Everything you type stays on this page. Nothing is sent anywhere or tied to your name.
Compare key dimensions in an AI-generated model with the numbers you started from
Add each dimension with where the expected number came from and the number in the model. You get a pass or fail against your tolerance, a log and warnings for gaps. A pass shows two numbers match. It does not show the design complies with any code.
How do I check an AI-generated model against the drawings I started from? The short answer
Pick the dimensions that matter most (overall sizes, room widths, door and stair sizes, levels), note where each expected number comes from, and measure the same thing in the model. Compare against a tolerance you set in advance. A scale or unit mix-up often shows as every number being off by the same factor.
Then have the person responsible for the design review the model and sign off. A spot check finds some errors. It does not check codes, structure or anything you did not measure.
Why this came up in November 2026
New AI tools now turn sketches and prompts into models. Counts below were read on 13 November 2026 (Australia/Brisbane) unless the text says another date. Blender 3D Architect’s “AI Just Mixed Revit, ArchiCAD, and Blender Into One Free BIM Tool” showed 4,195 views after upload on 12 November 2026, and Rabbitt Design’s “ChatGPT Codex - From a Hand Drawing to a Nearly Finished Project in Chief Architect” showed 964 views after upload on 8 November. We have not checked what either video says or how accurate any tool is.
We rate demand as modest. These are signals of interest, not a count of people who want this tool. For edits made by an AI assistant inside a BIM model, see the BIM AI assistant model edit checklist.
What this tool does and does not do
The honest job of this page is to catch obvious mismatches early. See also the glossary entries for existed no later than and SHA-256.
| Part | What it does | What it does not do |
|---|---|---|
| Spot check | Compares each expected number with the model number in mm, cm, m, in or ft, and marks it within or outside your tolerance. | Measure the model for you. |
| Warnings | Flags dimensions outside tolerance, missing numbers, expected numbers with no source, too few checks and a likely scale or unit mix-up. | Check codes, structure or safety. |
| Files | Gives you the log as text and as a spreadsheet file. | Send anything anywhere. |
| A TimeBind of a file you already hold | Records that an exact file existed no later than a recorded time and still matches, using a SHA-256 fingerprint made in your browser. The file stays on your device. | Show the model is correct or that the design complies with anything. |
If you may need to show your files later
For a model you will issue or build from:
- Save the model file you checked, the source drawings and this log, together.
- Make a TimeBind of each exact file you already hold. The fingerprint is made in your browser and the file stays on your device. You can later download a Proof of Time Certificate.
- Run the check again on each new model version.
A TimeBind shows each exact file existed no later than the recorded time and still matches. It does not show the model is correct.
First Pooled TimeBind free, no card, then from US$5. An ASAP TimeBind is US$15.
What a TimeBind shows, and what it does not. It shows that an exact file existed no later than a recorded time and that a copy shown later still matches its fingerprint. It does not show who made the file, who owns it, that its contents are true, or whether AI was used to make or edit it. This is general information, not legal advice.
AI model dimension spot check log: FAQ
Does a pass mean the model is right?
No. It means the numbers you checked match within your tolerance. Everything you did not check is unchecked.
What tolerance should I use?
That depends on the stage and the element. Set it before you check. The tool uses 10 mm if you leave it blank and says so.
Can I mix units?
Yes. Each dimension has its own unit, and the tool converts to millimetres to compare.
Why does it warn about scale?
If every model number is about the same multiple of the expected number, the model may be at the wrong scale or in the wrong units.
Does this replace a design review?
No. A person responsible for the design should review the model and sign off.
Is anything I type or tick sent to TimeBinder?
No. This page runs in your browser. What you type stays on the page.
Related guides and tools
- BIM AI assistant model edit checklistAI edits in a BIM model
- AI visualization handoff checkerHand off AI renders
- Drawing issue register builderTrack drawing issues
- AI planning drawing checklistAI in planning drawings
- GlossaryPlain definitions of fingerprint, SHA-256 and existed no later than
- All free toolsPrivate, in-browser tools
Date the exact files you already hold
Add a layer of protection against AI and human fraud and disputes: a dated, checkable record of the model and drawings you hold.
- Open the app and sign in with email or Google.
- Add your files. They stay on your computer.
- Seal them and download your Proof of Time certificates.
First Pooled TimeBind free, no card, then from US$5. See pricing.