Claude Changed Its Search Index, And Told No One. So We Measured It.
Claude's default search now uses a different search index. We ran 50 prompts in both modes and found 10% domain overlap. Here's what it means for your brand.
Author
Tarsh Swarnkar
Data & Infrastructure @ Writesonic
Tarsh builds the data pipelines behind Writesonic's AI visibility research, including the AI Ads Index. His work focuses on real-time measurement of how AI platforms cite, mention, and rank brands.
Articles by Tarsh Swarnkar
Introducing Muse Spark tracking in Writesonic
Writesonic now tracks Muse Spark. Explore how Meta’s model represents your brand, which competitors appear in its recommendations, and the sources it cites.
GPT-6 Astra Searches 40% Less Than the Model Before It, and Reads Brands Directly Instead
We tested OpenAI's new flagship. It searches the web 40% less than the model it replaced, and the searches it keeps go straight to brand pages, not reviews. Your pricing page is the new front line.
The Brand at #1 in AI Search Changes 52% of the Time. We Ran 631,999 Prompts to Measure It.
We ran 631,999 prompt-model pairs across 7 AI platforms, from March through June 2026, each prompt repeated a minimum of 10 times.
Which Sources Influence AI Answers? 2,000+ Brand Study
We measured citation influence across 2,000+ brands. YouTube (3.19x), Reddit (3.17x), and Gartner (3.15x) deliver 3x lift. Your own website? Just 1.3x.
Introducing the AI Ads Index. The First Public Tracker for ChatGPT Ads.
The AI Ads Index is live. The first public daily index of sponsored ads inside ChatGPT answers, refreshed every morning.
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