Zember Furnace — local AI for 24 GB graphics cards

Granite 4.1 30B on your own PC, for 24 GB graphics cards. Reads every page of a contract, cites the page, uploads nothing.

Check your computer before you buy

A graphics card with 24 GB of memory or more
Known to fit: RTX 3090, RTX 4090, Tesla P40 24GB, Tesla M40 24GB.
Windows
Task Manager → Performance → GPU → Dedicated GPU memory shows what your card has.
Each model is a separate product
The key opens Zember Furnace and only Zember Furnace. Pick the one for your card.

Reads the whole contract
For a summary, the deadlines, the parties, the amounts or the risky clauses it reads every page, part by part.
Cites the page for every point
Like (p. 7), so you can check it before you rely on it.
Catches the clause that changes another
The app finds every clause that replaces or amends an earlier one and quotes it exactly, so the value that applies now comes first.
Nothing leaves your computer
It only listens on this machine. After the brain is installed you can unplug the internet.

Contract test: 12 of 12 answers right
A 3-page contract built to trip it up (the real late-payment penalty in the last clause, wrong figures on the way, a later clause replacing an earlier one). Four questions, each asked three times, through the very app in the box.
5.1 tokens a second on our NVIDIA GeForce RTX 5070 (12 GB) + 64 GB RAM
That card is smaller than the 24 GB this model is for, so part of it sat in RAM; on the right card it goes faster.

Granite 4.1 30B Q5_K_M
19.1 GB, Apache 2.0. It comes straight from the people who made it, at a fixed version, on the first start.
The app, the engine and OCR for scanned pages
About 135 MB to download. The manual inside also shows how to install the brain without internet.

It is a reading assistant, not a lawyer: check every point against the page it cites.