AI Model Update Calendar 2026 — Live tracking of ChatGPT, Claude, Gemini and Perplexity

Ranklit.io monitors all major AI models weekly for training updates. The AI Model Update Detector automatically detects when ChatGPT (OpenAI), Claude (Anthropic), Gemini (Google) or Perplexity update their training.

How does the Update Detector work?

50 baseline prompts are sent to each AI model every week. The answers are compared via cosine similarity with the previous week's answers. Significant deviations indicate a training update. The changes are classified as Minor, Moderate or Major and accompanied by an AI-generated description.

Why are AI updates relevant?

When an AI model updates its training, the recommendations and mentions for your website can change. An update can cause your brand to suddenly be recommended more or less often. Ranklit's Update Detector helps you spot these changes immediately and respond to them.

Monitored AI models

ChatGPT (OpenAI GPT-4, GPT-4o), Claude (Anthropic Claude 3.5, Claude 4), Gemini (Google Gemini Pro, Gemini Ultra) and Perplexity. Each model is tracked individually with its own change score and historical trend data.