ChatGPT Ads Went From 0.03% to 14% Overnight. 47.7% of US Responses Now Carry One
We measured ChatGPT ad penetration across 363,129 responses over 31 days. For 30 of those days, ads were a rounding error. On day 31, the surface flipped.
Data & Studies
Original Writesonic research on AI search behavior and citation patterns.
Recent articles on Data & Studies
GPT-5.5 Instant vs GPT-5.3 Instant: Brand Citations Drop 55%, Reddit Becomes ChatGPT’s Top Source
ChatGPT replaced GPT-5.3 with GPT-5.5 as its free-tier default in early May. The data shows brand citations halved, Reddit became the most-cited domain by a 3x…
GPT-5.5 Cites Brand Sites 47% of the Time. GPT-5.4 Did 57%. The Citation Data No One’s Talking About.
GPT-5.5 cites brand websites 47% of the time, down from GPT-5.4’s 57%. The mechanism: site: operator usage collapsed from 40.5% of searches to 12.6%. Here’s wh…
AI Crawler Study: What 60+ Tests Across 6 LLMs Reveal
Most of your website is invisible to AI. We planted 60 hidden markers across a test page and asked 6 AI assistants to find them. The results will change how yo…
56% of GPT-5.4’s Citations Go to Brand Websites. Only 8% of GPT-5.3’s Do.
We tested 50 prompts across ChatGPT’s new models and extracted every fan-out query, web search result, and citation. GPT-5.3 sends users to blog posts about yo…
2.4 Million Domains Study: UGC Platforms Own AI Citations
Key Takeaways So far in my foray into LLM data, I’ve focused on content types and query frames. What formats get cited, how platforms respond to different inte…
Reviews Surge 8.9x in Troubleshooting Queries: The LLM Citation x Frame Study
Key Takeaways Welcome back to our AI search lab. Last time, I analyzed LLM citation patterns in branded vs. non-branded prompts. This week, I wanted to find ou…
Listicles Drop 37%, Reviews Jump 637%: Branded vs Non-Branded Prompt Study
Key Takeaways: Another week, another peek under the LLM hood. Last time, I looked at platform citation behavior across industries to try and spot if there were…
Get our best insights, weekly
Join 10,000+ marketers getting data-backed strategies on AI search visibility and SEO. No fluff.
- No spam.
- Unsubscribe anytime
