jevgram

jevgram is a small command-line tool that checks if a document is AI-generated. Similar to pangram but a lot cheaper. You need API key from TYPESAFE_API_KEY (super easy, couple of clicks)

Supported inputs

• Plain text and source-like text files, such as .txt, .md, .tex, and similar files
• PDF files
• DOCX files

Minimal example:

$ export TYPESAFE_API_KEY=apikey_...
$ pipx install jevgram
$ jevgram README.md # this document
File: README.md
Type: text
Characters extracted: 1957
Characters sent to JEV: 1957
Model: jev-1.13.0
Prediction: AI
Probability AI: 87.00%
Probability human: 13.00%
Confidence: 74.00%

PDF extraction uses pypdf. DOCX extraction is handled directly from the Word XML contained in the .docx file.

Detailed instructions

Install

With pipx (MacOS, Linux):

pipx install jevgram

With uvx:

uvx jevgram --help

API key

jevgram uses TypeSafe JEV API. Set one of these environment variables before running it:

export TYPESAFE_API_KEY="your-key"
# or
export JEV_API_KEY="your-key"

You can also pass a key directly with --api-key, but environment variables are safer for shell history and scripts.

Usage

jevgram document.txt
jevgram paper.pdf
jevgram manuscript.docx --json

By default, long files are sampled down to 32,000 characters using the beginning, middle, and end of the extracted text. To send the whole extracted document, use:

jevgram document.txt --max-chars 0

To inspect extraction without calling JEV:

jevgram document.pdf --extract-only

To inspect the request body without calling JEV:

jevgram document.txt --dump-request

Output

Human-readable output includes the predicted class, AI probability, human probability, confidence when provided by JEV, and whether the input was truncated. --json produces machine-readable output for scripts.

Cost

This app is open-source/free on my end, but it uses JEV API, which is not free. Works like this: once you create a TYPESAFE account and API key, you get a credit for $5 free usage. jevgram is intended for personal use, and you can check a lot of documents for $5. Once you use up the free credit, jevgram will fail and politely tell you to add credit card number to TYPESAFE (to be fair, this is untested because I have not reached that point yet)

Notes

Authorship detection is probabilistic.

This document is mostly AI :-)