# TaxAct Business vs Vertex: which do AI models recommend for corporate tax provision, October 2026

Finance AI Recommendation Index, October 2026 Edition, Corporate tax provision. Zero of fourteen models named TaxAct Business first on the direct prompt; zero named Vertex. Page: https://finance-ai-index.com/tax/corporate-tax-provision/taxact-business-vs-vertex/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| TaxAct Business | 13% | #3 of 9 | 0% | 10 | 9 of 14 |
| Vertex | 4% | #5 of 9 | 10% | 10 | 7 of 14 |

## The direct prompt, model by model

- Claude Haiku 4.5: neither named (first choices: Bloomberg Tax Provision) (alternatives: Longview Tax, Thomson Reuters ONESOURCE Tax Provision)
- GPT-5.4 mini: neither named (first choices: Bloomberg Tax Provision, Longview Tax)
- Gemini 3.5 Flash: neither named (first choices: Bloomberg Tax Provision) (alternatives: Exactera Tax Provision, OneStream, Vena Solutions)
- Perplexity Sonar: neither named (first choices: Thomson Reuters ONESOURCE Tax Provision) (alternatives: Bloomberg Tax Provision, Longview Tax, Vertex Tax Accounting, Vertex Tax Provision)
- Grok 4.1 Fast: neither named (first choices: Thomson Reuters ONESOURCE Tax Provision, Vertex Corporate Tax) (alternatives: Bloomberg Tax Provision, Sovos Tax Provision)
- Mistral Small: neither named (first choices: Bloomberg Tax Provision) (alternatives: Oracle Tax Reporting)
- DeepSeek V4 Flash: neither named (first choices: Bloomberg Tax Provision) (alternatives: TaxPoint, Thomson Reuters ONESOURCE Tax Provision, Vertex Tax Accounting)
- Llama 4 Maverick: neither named
- Qwen 3.7 Flash: neither named (first choices: TaxSeries) (alternatives: Bloomberg Tax Provision, OneStream Tax Provision, Sovos Tax Provision)
- Kimi K2: neither named (first choices: Thomson Reuters ONESOURCE Tax Provision) (alternatives: Bloomberg Tax Provision, Vertex Tax Accounting)
- GLM 4.7 FlashX: neither named (first choices: Thomson Reuters ONESOURCE Tax Provision) (alternatives: CCH Axcess Tax, Vertex Tax Accounting)
- MiniMax M2.5: neither named (first choices: Bloomberg Tax Provision, Vertex Tax Accounting) (alternatives: Oracle Tax Reporting, Thomson Reuters ONESOURCE Tax Provision)
- GPT-6 Luna: neither named (first choices: Thomson Reuters ONESOURCE Tax Provision) (alternatives: CSC Corptax)
- Muse Glimmer 30B: neither named (first choices: Thomson Reuters ONESOURCE Tax Provision) (alternatives: Bloomberg Tax Provision, OneStream Tax Provision, Vertex Tax Accounting)

## What the models said about TaxAct Business

- "TaxAct Business \u2013 Best Value for Small Companies ... at ~$170-280/year is your most cost-effective option" (Kimi K2, budget prompt, first choice)
- "Top Recommendation: TaxAct Business ... Often cited as the most cost-effective professional-grade option." (Qwen 3.7 Flash, budget prompt, first choice)
- "TaxAct Business is generally considered the best value for small businesses with limited budgets" (Mistral Small, budget prompt, first choice)

## What the models said about Vertex

- "Vertex - a comprehensive tax compliance software that can handle complex tax logic and is used by large and mid-market companies." (Llama 4 Maverick, paraphrase prompt, first choice)

Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all fourteen models, for a mid-market B2B company; rank is within the category. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.