Corporate tax provision · October 2026 Edition
Vertex vs Sovos Tax Provision
Zero of fourteen models named Vertex first on the direct prompt; zero named Sovos Tax Provision. Vertex was named by seven of the fourteen models and Sovos Tax Provision by nine and Vertex carries 10 labels and Sovos Tax Provision 16, so the shares are not directly comparable.
Named in five categories this edition.
Named in one category this edition.
First-choice share4%2%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate10%0%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#5#6A position in a field of 9; printed, not drawn.
Labels1016A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Vertex 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 Vertex · Thomson Reuters ONESOURCE Tax Provision vs Sovos Tax Provision · Bloomberg Tax Provision vs Vertex
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.
VertexFirst choices, of fourteen modelsSovos Tax Provision
Direct00
Paraphrase201 against Vertex
Comparative12
Budget-constrained01
Scale-constrained00
Negative00
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 Vertex and Sovos Tax Provision 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 | |
Vertex Sovos Tax Provision first choice named as an alternative argued againstblank: not namedEach cell is one answer, Vertex on the left and Sovos Tax Provision on the right.The direct prompt
The plain question, one answer per model, grouped by where Vertex and Sovos Tax Provision stood in it.
Neither was the first choice, one was named
2 of 14 modelsThe answer put something else first and named one of the two as an alternative.Grok 4.1 FastThomson Reuters ONESOURCE Tax Provision, Vertex Corporate Tax alternatives: Bloomberg Tax Provision, Sovos Tax Provision
Qwen 3.7 FlashTaxSeries alternatives: Bloomberg Tax Provision, OneStream Tax Provision, Sovos Tax Provision
Neither was named
12 of 14 modelsThe answer made no first choice from these two in this category.Claude Haiku 4.5Bloomberg Tax Provision alternatives: Longview Tax, Thomson Reuters ONESOURCE Tax Provision
GPT-5.4 miniBloomberg Tax Provision, Longview Tax
Gemini 3.5 FlashBloomberg Tax Provision alternatives: Exactera Tax Provision, OneStream, Vena Solutions
Perplexity SonarThomson Reuters ONESOURCE Tax Provision alternatives: Bloomberg Tax Provision, Longview Tax, Vertex Tax Accounting, Vertex Tax Provision
Mistral SmallBloomberg Tax Provision alternatives: Oracle Tax Reporting
DeepSeek V4 FlashBloomberg Tax Provision alternatives: TaxPoint, Thomson Reuters ONESOURCE Tax Provision, Vertex Tax Accounting
Llama 4 Maverickno first choice
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
MiniMax M2.5Bloomberg Tax Provision, Vertex Tax Accounting alternatives: Oracle Tax Reporting, Thomson Reuters ONESOURCE Tax Provision
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
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
Level: the same share of first choices.
Vertex0%#– of 9Sovos Tax Provision0%#7 of 9Mid-marketThe figures above
Vertex leads by two points.
Vertex4%#5 of 9Sovos Tax Provision2%#6 of 9Enterprise
Level: the same share of first choices.
Vertex2%#7 of 9Sovos Tax Provision2%#5 of 9What 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
What the models said about Sovos Tax Provision
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Three of four in this category shown.
“the lowest cost provision-grade options are the smaller cloud provision platforms, e.g. Longview Tax Provision or Sovos Tax Provision” Muse Glimmer 30B · budget prompt · first choice
“### 1. Sovos Tax Provision - Best for: Global tax teams needing repeatable ASC 740 and IAS 12 provision-close workpapers” Kimi K2 · comparative prompt · first choice
“Sovos Tax Provision is considered the best overall” Llama 4 Maverick · comparative prompt · first choice
Also compared
Thomson Reuters ONESOURCE Tax Provision vs VertexThomson Reuters ONESOURCE Tax Provision vs Sovos Tax ProvisionBloomberg Tax Provision vs VertexBloomberg Tax Provision vs Sovos Tax ProvisionTaxAct Business vs VertexTaxAct Business vs Sovos Tax ProvisionLongview Tax vs VertexLongview Tax 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.