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GLTR

Free
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About

GLTR (Giant Language Model Test Room) is a collaborative tool by MIT-IBM Watson AI lab and HarvardNLP, designed to detect text generated by large language models like GPT-2. It operates by analyzing the likelihood of each word in a given text based on the language model's predictions. The tool visually highlights words with a colored mask: green for top 10 most likely words, yellow for top 100, red for top 1,000, and purple for less likely words. This visual footprint helps users discern patterns indicative of machine generation, where texts often stick to highly probable words. GLTR also provides histograms summarizing word categories, probability ratios, and prediction entropies for a comprehensive forensic analysis. It allows users to paste any text or use provided examples to investigate whether it looks "too likely" to be human-written, offering insights into the textual characteristics of both human and AI-generated content.

Platform
Web
Task
text generation detection

Features

displays top 5 predicted words and probabilities on hover

detects artificial text from various generation systems

offers histograms for prediction entropy

shows histograms for probability ratio of predicted vs. actual words

provides histograms for word category distribution

overlays colored mask on text based on word ranking

analyzes text using language models like gpt-2

inspects visual footprint of automatically generated text

Pricing Plans

Free
Free Plan

Detect automatically generated text

Visual forensic analysis

Access to GPT-2 117M model analysis

Open-source code

Live demo access

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