AI-powered LLM identifier & knowledge hub — with expert human insight

LLMDetective identifies large language models (LLMs) across the web, offering a structured, searchable wiki of every model we find — from ChatGPT to open-source tools. Explore the technology behind today's AI, backed by transparent data and human curation.

Identify, Search, and Contribute

Identify

Use our tools to detect which large language model (LLM) generated a given text, leveraging advanced AI identification.

Search our structured, searchable wiki of LLMs—from ChatGPT to open-source models—to find detailed information on every model we track.

Contribute

Edit and improve our wiki data. Help keep the LLM knowledge base accurate and up to date for the whole community.

Identification Methodology

Statistical Fingerprinting

LLM responses to an experimentally selected "best" user prompt are converted into TF‑IDF trigram vectors with interpretable features and weights.

Similarity‑Based Identification

Each vector is compared against a library of known LLMs using cosine similarity to produce a ranked shortlist of likely LLMs.

Predict or Abstain

A fixed, experiment‑selected threshold abstains on low‑similarity cases, ensuring reliable and transparent decisions.

Get Started

Try our Identify tool or browse the Wiki.