What is ChatGPT Search?
ChatGPT Search is OpenAI's integrated web-search experience inside ChatGPT — launched October 2024, generally available to free users by 2025. Instead of routing queries to a separate search engine, the user asks ChatGPT a question, the model performs live web search behind the scenes, then composes a sourced answer with inline citation links. ChatGPT Search has become a meaningful destination for top-of-funnel and commercial-investigation queries: 'best AI UGC tool 2026,' 'compare Heygen vs Synthesia,' 'how much does product photography cost.' Citation share in ChatGPT Search is now an instrumentable KPI for GEO programs alongside Perplexity, Google AI Overviews, and Google AI Mode. Sites cited by ChatGPT Search see a measurable referral-traffic and brand-search lift even when click-through rates on the citation are low — the brand mention itself drives downstream organic search.
Key statistics
- ChatGPT had ~600M weekly active users by Q1 2025; ChatGPT Search rolled out to all free users (OpenAI Q1 2025 disclosures).
- GEO instrumentation tools (Otterly, Profound, Goodie) added ChatGPT Search citation tracking by Q4 2024 as the third major AI surface alongside Perplexity and AI Overviews.
- Brands cited in ChatGPT Search answers see ~20–35% brand-search lift over 90 days vs uncited control cohorts (early GEO case studies, 2025).