# Vertex O Series: how AI models rank it, October 2026

Finance AI Recommendation Index, October 2026 Edition. Named in 3 judge labels across 1 categories by 3 of 14 models. Page: https://finance-ai-index.com/vendors/vertex-o-series/

## Standing by category

| Category | Share | Rank | Negative rate | Labels |
|---|---|---|---|---|
| Corporate tax provision | 0% | 27 | 0% | 3 |

## What the models said for it

- "Vertex highlighted by user feedback as a top-rated product for mid-sized companies" (Perplexity Sonar, Corporate tax provision)
- "Best for: Companies with high transaction volumes and complex tax positions" (MiniMax M2.5, Corporate tax provision)

## Movement since September 2026

Floor: 10 points of share, measured on the calibration repeat. A larger change is movement; a smaller one is noise.

- Corporate tax provision: 2% to 0%, −2. Inside the floor by 8 points · rank 13 → 27 of 102.

## Record

- Method: https://finance-ai-index.com/methodology/
- Raw judge labels and full responses: https://finance-ai-index.com/data/
- License: CC BY 4.0. Cite as Finance AI Recommendation Index, October 2026 Edition, finance-ai-index.com.