OpenAI ChatGPT Citation Share - January 2026

The top 15 websites ChatGPT Search cited most in January 2026, ranked by share of all citations, with notes for SEO teams working on generative engine optimization (GEO).

Based on Promptwatch data from Dec 31 - Jan 30, 2026. Citations tracked from real prompt responses using ChatGPT Search when triggered in the UI.

The Most Cited Domains on OpenAI ChatGPT in January 2026

In January, ChatGPT Search has two clear reference points: Wikipedia at 3.63% of all citations and Reddit at 2.58%. Together they collect 6.2% of citations, nearly double what the other 19 tracked domains manage combined (about 3.3%). ChatGPT's trust is split between encyclopedic authority and community discussion.

Below those two, the field flattens out fast: no other domain reaches even 0.4%, with LinkedIn (0.39%), Forbes (0.33%), and TechRadar (0.31%) leading a tightly packed chasing group. That means the overwhelming majority of citations flow to a long tail of smaller, specialized sites, which is good news if you don't run a household-name domain.

What this means for you

• Invest in the two channels ChatGPT already trusts: keep any Wikipedia articles about your company or category accurate and well-sourced, and become a genuine participant in the subreddits where your customers ask questions.
• Compete in the long tail. With 19 of the 21 tracked domains sitting below 0.4%, a well-structured, factual page on your own site has a realistic chance of being cited for the specific prompts your buyers actually type.
• Treat January as your baseline: record your citation share for the prompts that matter to you now, so you can measure whether your GEO work moves the needle in the months ahead.

How we collect this data

We collect millions of prompt responses, citations, and click data from the actual user interfaces of major AI platforms: over 26 billion data points and growing. This gives us one of the largest datasets on how AI search engines cite sources and recommend brands.

Real UI monitoring

Data straight from the interfaces of ChatGPT, Gemini, Perplexity, Claude, AI Overviews, and more.

26B+ data points

Over 26 billion analyzed citations, prompts, and responses, one of the largest AI search datasets available.

Continuously updated

Refreshed constantly so the trends you see reflect the latest behavior of AI search engines.

Aggregated & public

Published freely for the GEO community, based on aggregated, non-identifiable trends.