✓ Checkistan
text v1.0

AI Detector - Unlimited Free AI Checker for ChatGPT, Gemini & More

Analyze articles, essays, and documents for AI-generated content across GPT-5 (Instant & Thinking), Gemini 3 (3.6 Flash & 3.1 Pro), Claude 3.5/3.7, and Llama 3. Inspect model likelihoods, sentence burstiness, syntactic perplexity, and visual heatmaps.

✓ 100% Free & Unlimited ✓ Browser Local & Private (Zero Cloud Upload) ✓ Instant Real-Time Processing
AI Detector - Unlimited Free AI Checker for ChatGPT, Gemini & More Free Online Tool Preview

Interactive AI Detector - Unlimited Free AI Checker for ChatGPT, Gemini & More workspace processes all data directly inside your browser for maximum privacy.

How to Use AI Detector - Unlimited Free AI Checker for ChatGPT, Gemini & More Online

  1. Step 1: Paste your article, essay, or research paper into the text editor.
  2. Step 2: Review the overall AI probability score, multi-model attribution breakdown (GPT-5, Gemini 3, Claude, Llama), and sentence risk analysis.
  3. Step 3: Toggle Heatmap mode to visually highlight flagged sentences and identify generative reasoning patterns.

Frequently Asked Questions

Is this AI detector completely free to use?

Yes! Checkistan provides 100% unlimited, free AI detection with no word limits or signup required.

Which AI models can this tool detect?

It detects content generated by OpenAI GPT-5 (Instant & Thinking) & GPT-4o, Google Gemini 3 (3.6 Flash & 3.1 Pro), Anthropic Claude 3.5/3.7, and Llama 3.

Does it keep my text private?

Yes, all text analysis runs 100% securely inside your browser session and is never stored on external servers.