# Research · HR AI Recommendation Index

September 2026 Edition. Page: https://hr-ai-index.com/research/

- [The same question, asked twice](https://hr-ai-index.com/research/repeat-measurement/): Asked again with nothing changed, the models moved their own first choice 70% of the time, and the leader still held in 7 of 10 categories.
- [The buyer's size changes the answer](https://hr-ai-index.com/research/buyer-size/): In 48 of 50 categories the leader differs between small business, mid-market and enterprise buyers. The same category, three standings.
- [What the answers cite](https://hr-ai-index.com/research/what-the-answers-cite/): Four of the twelve models return a source list; across their 3,270 answers, 28% of the 40,252 citations point at a vendor's own site and 7% at a review site.