Tech riderRev. 24 Sept 2026
GLTR (Giant Language Model Test Room)
- 1Runs onself-hosted, Web
- 2CostsNot stated by the maker
1 lines stated Written from the maker's own pages

Overview
GLTR (Giant Language Model Test Room) is ranked #34 of 45 in AI content detection software on Specifiction. It runs on Self-hosted, Web.
Compared on AI content detection software
- Free plan
- Yesgltr.io
Facts
- Purpose
- GLTR is a tool to help people assess whether text was generated by a language model.arxiv.org · 5 Oct 2026
- Detection methods
- It applies baseline statistical methods to identify generation artifacts across common sampling schemes.arxiv.org · 5 Oct 2026
- Audience
- The paper describes its detection methods as simple and explainable to non-experts.arxiv.org · 5 Oct 2026
- Study result
- In a human-subjects study, GLTR’s annotation scheme raised fake-text detection from 54% to 72% without prior training.arxiv.org · 5 Oct 2026
- Availability
- The project paper describes GLTR as open-source and publicly deployed.arxiv.org · 5 Oct 2026
- Models
- The project’s server supports gpt-2-small, BERT, or a custom model.github.com · 5 Oct 2026
- Self-hosting
- The repository documents installing dependencies and running the server locally.github.com · 5 Oct 2026
- Customization
- Developers can add a custom model by implementing a backend API that inherits from AbstractLanguageChecker and registering it.github.com · 5 Oct 2026
- Web demo
- The repository links to an online demo at gltr.io/dist/index.html.github.com · 5 Oct 2026
- License
- The repository identifies the project license as Apache 2.github.com · 5 Oct 2026
Company
- Founded
- 2019gltr.io · 4 Oct 2026
Best GLTR (Giant Language Model Test Room) alternatives
See all 20 All accessCh 01 TrustOriginality.ai Free planAndroidAPI from €4.99/mo7.5 All accessCh 02 GPTZero Free planFree trialAPI from $8.33/mo7.3 All accessCh 03 Polygraf AI Detector Free planFree trialAPI from $9.95/mo7.3 All accessCh 04 Trinka Free planAPIBrowser Free to start7.2 All accessCh 05 Winston AI Free planFree trialAPI from $5/mo7.2 All accessCh 06 Ahrefs Free planAPIWeb from $29/mo7.1
Where it ranks on Specifiction
Is GLTR (Giant Language Model Test Room) yours?
Claim it for free: prove the domain, then correct facts, plans and screenshots. An editor reviews every change.
Sources
- arxiv.org/abs/1906.04043· checked 5 Oct 2026
- github.com/HendrikStrobelt/detecting-fake-text· checked 5 Oct 2026
- gltr.io· checked 4 Oct 2026



