The model reads
Fable 5 interprets legends, room labels, and ceiling heights — reading only. It never measures area or touches a price.
Drywall takeoff · built on proof
The drywall takeoff you can defend line by line.
Upload a plan set. Get wall and ceiling square footage by room and a priced bid — where every number points back to the exact spot on the sheet it came from, with a confidence flag you can trust.
The model reads. Code measures. You approve.
bid_sheet.pdfSelect a number →
Bedroom 2 · Wall — gross wall area · 4 faces · clean vector
01 — The one rule
An anti-hallucination architecture, not a promise.
Groma never lets AI eyeball a square foot or do a dollar of math. The split is enforced in the code, so the same plans always give you the same bid.
Code measures
Deterministic geometry builds the wall graph and room polygons; deterministic code prices them. Same plans in, same bid out.
You approve
Nothing becomes a bid number until you see the source region it came from and accept it. Low-confidence reads surface first.
No number in your bid was ever eyeballed or hallucinated.
02 — Why Groma
What the fast-guess tools can’t hand you.
Every number traces to the plans
Click any wall SF or dollar figure and jump to the exact region on the sheet it was measured from. No competitor links quantities to source.
A confidence flag on every number
Clean vector geometry reads high; anything inferred or low-quality reads low — and low always surfaces at the top of review.
Shared walls counted once
A true wall graph dedupes every partition and reports each drywalled face to the room it faces. No double-counted shared walls.
Deterministic, reproducible pricing
Integer-cents math, one config file, no magic numbers, no AI in the money. The bid is auditable, and it's the same every run.
03 — How it works
Five stages. One direction. Every step auditable.
Each stage writes a structured artifact the next one reads, so you can open any number and walk it all the way back to the sheet.
- 01
Ingest & classify
Split the sheet set, decide vector vs. raster per sheet, and classify each sheet's type.
- 02
Scale & verify
Read the stated scale and verify it against a measured dimension — you confirm before anything is measured.
- 03
Extract
Code builds the wall graph and room polygons in real feet; the model reads the legend, labels, and heights.
- 04
Quantify
Board area per unique wall edge, faces allocated to rooms, ceiling area from footprint — every number traceable.
- 05
Price & review
A blended per-SF bid you review against highlighted sources, then export to xlsx and a client-facing pdf.
04 — The difference
Togal and STACK hand you fast measurements you still take on faith. Groma links every square foot and every dollar back to the exact spot on the plans it came from — with the math done by deterministic code the AI is never allowed to touch.
Bring your plans. Keep your judgment.
A takeoff and a priced bid you can stand behind in a dispute — because every figure shows its work.
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