Index › Tax and compliance › Corporate tax provision › Thomson Reuters ONESOURCE Tax Provision vs Vertex
Corporate tax provision · October 2026 Edition
Thomson Reuters ONESOURCE Tax Provision vs Vertex
Six of fourteen models named Thomson Reuters ONESOURCE Tax Provision first on the direct prompt; zero named Vertex. Thomson Reuters ONESOURCE Tax Provision was named by fourteen of the fourteen models and Vertex by seven and Thomson Reuters ONESOURCE Tax Provision carries 57 labels and Vertex 10, so the shares are not directly comparable.
Named in one category this edition.
Named in five categories this edition.
First-choice share21%4%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate39%10%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#1#5A position in a field of 9; printed, not drawn.
Labels5710A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Thomson Reuters ONESOURCE Tax Provision reading right to left. Rank and label count are printed, not drawn.Bloomberg Tax Provision was named alongside these two in eleven of the fourteen direct answers. Thomson Reuters ONESOURCE Tax Provision vs Bloomberg Tax Provision · Thomson Reuters ONESOURCE Tax Provision vs TaxAct Business · Thomson Reuters ONESOURCE Tax Provision vs Longview Tax
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; every quote names the model and the prompt it came from. Both figures come from the corporate tax provision page.
By framing
How many of the fourteen models made each the first choice, per way of asking, and how many argued against it.
Thomson Reuters ONESOURCE Tax ProvisionFirst choices, of fourteen modelsVertex
Direct602 against Thomson Reuters ONESOURCE Tax Provision
Paraphrase421 against Vertex
Comparative81
Budget-constrained007 against Thomson Reuters ONESOURCE Tax Provision
Scale-constrained102 against Thomson Reuters ONESOURCE Tax Provision
Negative009 against Thomson Reuters ONESOURCE Tax Provision
Bars are first choices, 0 to 14 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to fourteen.
Every model, every framing
The eighty-four answers behind the chart above, one cell each: where Thomson Reuters ONESOURCE Tax Provision and Vertex stood in it.
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | | | ||||
| GPT-5.4 mini | | | ||||
| Gemini 3.5 Flash | | | | | | |
| Perplexity Sonar | | | ||||
| Grok 4.1 Fast | | | | | | |
| Mistral Small | | | | |||
| DeepSeek V4 Flash | | | | | | |
| Llama 4 Maverick | | | | |||
| Qwen 3.7 Flash | | | | | ||
| Kimi K2 | | | | | | |
| GLM 4.7 FlashX | | | | | ||
| MiniMax M2.5 | | |||||
| GPT-6 Luna | | | ||||
| Muse Glimmer 30B | | | | | | |
Thomson Reuters ONESOURCE Tax Provision Vertex first choice named as an alternative argued againstblank: not namedEach cell is one answer, Thomson Reuters ONESOURCE Tax Provision on the left and Vertex on the right.The direct prompt
The plain question, one answer per model, grouped by where Thomson Reuters ONESOURCE Tax Provision and Vertex stood in it.
Thomson Reuters ONESOURCE Tax Provision first, Vertex not the choice
6 of 14 modelsVertex was named in the answer but not as the choice, or not at all.Perplexity SonarThomson Reuters ONESOURCE Tax Provision alternatives: Bloomberg Tax Provision, Longview Tax, Vertex Tax Accounting, Vertex Tax Provision
Grok 4.1 FastThomson Reuters ONESOURCE Tax Provision, Vertex Corporate Tax alternatives: Bloomberg Tax Provision, Sovos Tax Provision
Kimi K2Thomson Reuters ONESOURCE Tax Provision alternatives: Bloomberg Tax Provision, Vertex Tax Accounting
GLM 4.7 FlashXThomson Reuters ONESOURCE Tax Provision alternatives: CCH Axcess Tax, Vertex Tax Accounting
GPT-6 LunaThomson Reuters ONESOURCE Tax Provision alternatives: CSC Corptax
Muse Glimmer 30BThomson Reuters ONESOURCE Tax Provision alternatives: Bloomberg Tax Provision, OneStream Tax Provision, Vertex Tax Accounting
Neither was the first choice, one was named
3 of 14 modelsThe answer put something else first and named one of the two as an alternative.Claude Haiku 4.5Bloomberg Tax Provision alternatives: Longview Tax, Thomson Reuters ONESOURCE Tax Provision
DeepSeek V4 FlashBloomberg Tax Provision alternatives: TaxPoint, Thomson Reuters ONESOURCE Tax Provision, Vertex Tax Accounting
MiniMax M2.5Bloomberg Tax Provision, Vertex Tax Accounting alternatives: Oracle Tax Reporting, Thomson Reuters ONESOURCE Tax Provision
Neither was named
5 of 14 modelsThe answer made no first choice from these two in this category.GPT-5.4 miniBloomberg Tax Provision, Longview Tax
Gemini 3.5 FlashBloomberg Tax Provision alternatives: Exactera Tax Provision, OneStream, Vena Solutions
Mistral SmallBloomberg Tax Provision alternatives: Oracle Tax Reporting
Llama 4 Maverickno first choice
Qwen 3.7 FlashTaxSeries alternatives: Bloomberg Tax Provision, OneStream Tax Provision, Sovos Tax Provision
Bold names in an answer are the products the judge labeled a first choice; a model naming several gives each of them that label. The full answer text for every row is in the record.
By buyer segment
The same question asked on behalf of a different buyer. Each standing is computed within its segment and they are never added together. The figures above are the mid-market standing, which is the one the category orders by.
Small business
Thomson Reuters ONESOURCE Tax Provision leads by two points.
Thomson Reuters ONESOURCE Tax Provision2%#6 of 9Vertex0%#– of 9Mid-marketThe figures above
Thomson Reuters ONESOURCE Tax Provision leads by seventeen points.
Thomson Reuters ONESOURCE Tax Provision21%#1 of 9Vertex4%#5 of 9Enterprise
Thomson Reuters ONESOURCE Tax Provision leads by forty-four points.
Thomson Reuters ONESOURCE Tax Provision46%#1 of 9Vertex2%#7 of 9What the models said about Thomson Reuters ONESOURCE Tax Provision
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“explicitly says to avoid or be cautious about Longview, ONESOURCE, Workiva, Oracle Tax Reporting, and Corptax” Perplexity Sonar · negative prompt · hard negative
“"Avoid for now: OneSource, Corptax, Longview – these are enterprise-grade tools with enterprise-grade price tags."” Muse Glimmer 30B · negative prompt · hard negative
“Avoid Bloomberg Tax Provision, Thomson Reuters ONESOURCE, and other enterprise\u2011grade provision platforms” GLM 4.7 FlashX · budget prompt · hard negative
“Often tops lists for consolidated provisions... ONESOURCE in audit-proofing; Analyst reports like Gartner often rate ONESOURCE/Vertex highly for this segment.” Grok 4.1 Fast · direct prompt · first choice
“Thomson Reuters ONESOURCE Tax Provision is the most cited first choice in the mid-market set, and is the accepted enterprise standard” Muse Glimmer 30B · paraphrase prompt · first choice
“1. ONESOURCE Tax Provision (by Thomson Reuters) ... Real-time capabilities and robust integration with other tax workflow tools.” Mistral Small · comparative prompt · first choice
What the models said about Vertex
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. One of one in this category shown.
“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
Also compared
Thomson Reuters ONESOURCE Tax Provision vs Bloomberg Tax ProvisionThomson Reuters ONESOURCE Tax Provision vs TaxAct BusinessThomson Reuters ONESOURCE Tax Provision vs Longview TaxThomson Reuters ONESOURCE Tax Provision vs Sovos Tax ProvisionBloomberg Tax Provision vs VertexTaxAct Business vs VertexLongview Tax vs VertexVertex vs Sovos Tax ProvisionAll fifteen head-to-head pages and the full corporate tax provision standing
Comparisons are drawn for the top eight products in each category, each against each. The output is the models' output; nothing here is a recommendation by the index.