DEJAN: ChatGPT 5 likely not using Schema Mark-up

Key Takeaways:

• Dan Petrovic tested the use of Schema Structured Data mark-up on a webpage of his asking ChatGPT 5 to summarize it

• There was no evidence of Schema even reaching the model

• The answers with and without Schema were quite similar

• ChatGPT itself replied multiple times that the browsing tool does not provide any Schema structured data just plain text from the raw HTML

• Inspired by a previous experiment that found impact of Schema on former ChatGPT models - https://www.getaiso.com/blog/schema_markup_experiment_blog_post

• Newer data from Julio Guevara: https://www.linkedin.com/posts/julio-guevara_geo-seo-gemini-share-7386662301531009024-bbbd/

Source: https://dejan.ai/blog/does-schema-help-with-ai/