# Research · HR AI Recommendation Index

October 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 71% of the time, and the leader still held in 23 of 30 readings (10 categories at three buyer sizes).
- [What moved between editions](https://hr-ai-index.com/research/movement/): Between the September 2026 Edition and the October 2026 Edition the leader changed in twelve of fifty categories, four of them by more than the noise floor of 13 points. Fourteen of 498 changes in first-choice share clear the floor. Movement is read over the twelve models both editions asked; GPT-6 Luna, Muse Glimmer 30B joined this edition and are in the standing but not yet in the comparison.
- [The buyer's size changes the answer](https://hr-ai-index.com/research/buyer-size/): In 57 of 58 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/): Five of the fourteen models return a source list; across their 4,407 answers, 25% of the 59,008 citations point at a vendor's own site and 6% at a review site.