ChatGPT

What is ChatGPT?

ChatGPT is OpenAI's flagship conversational AI product, built on the GPT (Generative Pre-trained Transformer) family of large language models. Launched in November 2022, it became the fastest-growing consumer product in history, reaching 100 million users within two months.

As of 2026, ChatGPT has over 200 million weekly active users and handles queries spanning every conceivable topic — from product recommendations to research to creative writing. For brands, ChatGPT is the most important AI engine to monitor.

Why ChatGPT matters for GEO

ChatGPT is the primary way most users interact with AI search. When users ask "what are the best project management tools" or "recommend a CRM for my small business," ChatGPT synthesizes information from across the web and provides a single conversational answer with brand recommendations.

Brands cited in ChatGPT responses gain visibility to a massive, purchase-intent audience. Being absent from ChatGPT recommendations means losing visibility to a growing share of search behavior.

How to monitor ChatGPT brand mentions

ChatGPT monitoring requires specialized tools because:

• ChatGPT responses are conversational, not list-based — mentions are embedded in narrative
• ChatGPT doesn't have inline citations like Perplexity — tracking requires analyzing the response text
• Responses vary by query, time, and conversation history
• Brand mentions can be direct ("X is a good tool") or implicit (recommended without naming)

See our ChatGPT brand monitor comparison and ranking of ChatGPT monitoring tools.