Corporate tax provision · September 2026 Edition
Thomson Reuters ONESOURCE vs Longview Tax
Zero of twelve models named Thomson Reuters ONESOURCE first on the direct prompt; one named Longview Tax. Thomson Reuters ONESOURCE was named by nine of the twelve models and Longview Tax by eleven and Thomson Reuters ONESOURCE carries 19 labels and Longview Tax 28, so the shares are not directly comparable.
Named in three categories this edition.
Named in one category this edition.
First-choice share10%7%Of first choices across the direct, paraphrase, budget and scale prompts, 0 to 100.
Negative rate16%18%Negative labels as a share of the product's labels, 0 to 100.
Rank in category#3#4A position in a field of 9; printed, not drawn.
Labels1928A count; the two differ.
The two percentage rows are drawn on one 0 to 100 track, Thomson Reuters ONESOURCE reading right to left. Rank and label count are printed, not drawn.Thomson Reuters ONESOURCE Tax Provision was named alongside these two in ten of the twelve direct answers. Thomson Reuters ONESOURCE Tax Provision vs Thomson Reuters ONESOURCE · Thomson Reuters ONESOURCE Tax Provision vs Longview Tax · Bloomberg Tax Provision vs Thomson Reuters ONESOURCE
Share is the count of first choices across the direct, paraphrase, budget and scale prompts over all twelve 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 twelve models made each the first choice, per way of asking, and how many argued against it.
Thomson Reuters ONESOURCEFirst choices, of twelve modelsLongview Tax
Direct011 against Longview Tax
Paraphrase40
Comparative00
Budget-constrained023 against Thomson Reuters ONESOURCE · 4 against Longview Tax
Scale-constrained00
Negative00
Bars are first choices, 0 to 12 each sideModels that argued againstA model can name both, so the two sides of a row do not sum to twelve.
Across every category in the September 2026 Edition, Thomson Reuters ONESOURCE and Longview Tax were named in the same answer eighteen times, of the 101 answers naming Thomson Reuters ONESOURCE and the 65 naming Longview Tax. In those answers Longview Tax took the first choice four times and Thomson Reuters ONESOURCE one.
Every model, every framing
The seventy-two answers behind the chart above, one cell each: where Thomson Reuters ONESOURCE and Longview Tax 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 |
Thomson Reuters ONESOURCE Longview Tax first choice named as an alternative argued againstblank: not namedEach cell is one answer, Thomson Reuters ONESOURCE on the left and Longview Tax on the right.The direct prompt
The plain question, one answer per model, grouped by where Thomson Reuters ONESOURCE and Longview Tax stood in it.
Longview Tax first, Thomson Reuters ONESOURCE an alternative
1 of 12 modelsThomson Reuters ONESOURCE was named in the answer but not as the choice, or not at all.Qwen 3.7 FlashLongview Tax alternatives: Bloomberg Tax Provision, CSC Corptax, Thomson Reuters ONESOURCE
Neither was the first choice, one was named
5 of 12 modelsThe answer put something else first and named one of the two as an alternative.Claude Haiku 4.5no first choice alternatives: Bloomberg Tax Provision, CSC Corptax, Longview Tax, Thomson Reuters ONESOURCE
GPT-5.4 miniThomson Reuters ONESOURCE Tax Provision alternatives: CCH Axcess/ProSystem fx tax provision offerings, Longview Tax, ONESOURCE Income Tax / Direct Tax Essential
Gemini 3.5 FlashBloomberg Tax Provision alternatives: Exactera Tax Provision, Longview Tax, Thomson Reuters ONESOURCE Tax Provision, Vena Solutions
Kimi K2Thomson Reuters ONESOURCE Tax Provision alternatives: CCH Tagetik, FloQast Tax Provision, Longview Tax, Lucasys Tax Provision, Sovos Tax Provision
GLM 4.7 FlashXThomson Reuters ONESOURCE Tax Provision alternatives: Bloomberg Tax Provision, Longview Tax, Sovos Tax Provision
Neither was named
6 of 12 modelsThe answer made no first choice from these two in this category.Perplexity SonarThomson Reuters ONESOURCE Tax Provision alternatives: CSC Corptax, Wolters Kluwer CCH Tagetik Tax Provision & Reporting
Grok 4.1 FastThomson Reuters ONESOURCE Tax Provision alternatives: TaxPoint, Taxfyle, Vertex Tax Accounting
Mistral SmallThomson Reuters ONESOURCE Tax Provision alternatives: Sovos Tax Provision, Vertex Tax Accounting
DeepSeek V4 FlashBloomberg Tax Provision, Thomson Reuters ONESOURCE Tax Provision alternatives: Sovos Tax Provision, Vertex Tax Accounting
Llama 4 MaverickThomson Reuters ONESOURCE Tax Provision alternatives: Avalara, CCH Axcess Tax, Taxfyle
MiniMax M2.5Bloomberg Tax Provision, Thomson Reuters ONESOURCE Tax Provision alternatives: CCH Tagetik Tax Provision & Reporting, Taxfyle, 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
Thomson Reuters ONESOURCE leads by two points.
Thomson Reuters ONESOURCE2%#8 of 9Longview Tax0%#9 of 9Mid-marketThe figures above
Thomson Reuters ONESOURCE leads by two points.
Thomson Reuters ONESOURCE10%#3 of 9Longview Tax7%#4 of 9Enterprise
Thomson Reuters ONESOURCE leads by eighteen points.
Thomson Reuters ONESOURCE20%#2 of 9Longview Tax2%#6 of 9What the models said about Thomson Reuters ONESOURCE
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of seven in this category shown.
“Enterprise Options to AVOID on a Limited Budget | Thomson Reuters ONESOURCE | $200K–$2M+/year” Kimi K2 · budget prompt · hard negative
“Avoid: Longview, ONESOURCE, Workiva, Oracle Tax Reporting, and Corptax.” DeepSeek V4 Flash · budget prompt · hard negative
“cannot justify the six-figure price tag of enterprise suites like Bloomberg or Thomson Reuters ONESOURCE” Qwen 3.7 Flash · budget prompt · soft negative
“Choose Thomson Reuters ONESOURCE if you are a larger, audited mid-market C-Corp with multiple subsidiaries” Gemini 3.5 Flash · paraphrase prompt · first choice
“I'd recommend Thomson Reuters ONESOURCE as the top choice for income tax compliance software” Grok 4.1 Fast · paraphrase prompt · first choice
“Corporate income tax (direct tax) | Thomson Reuters ONESOURCE or Vertex” GLM 4.7 FlashX · paraphrase prompt · first choice
What the models said about Longview Tax
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of eight in this category shown.
“Avoid: Longview, ONESOURCE, Workiva, Oracle Tax Reporting, and Corptax.” DeepSeek V4 Flash · budget prompt · hard negative
“Quote-based (typically high) | Enterprise CPM platform” Kimi K2 · budget prompt · hard negative
“Tier-1 enterprise software...routinely costs between $50,000 and $100,000+ annually” Gemini 3.5 Flash · budget prompt · soft negative
“Longview Tax is generally considered the strongest "middle ground" solution to escape the spreadsheet trap without breaking the bank” Qwen 3.7 Flash · budget prompt · first choice
“OneStream and Longview Tax are frequently recommended as they balance cost with essential features” Mistral Small · budget prompt · first choice
“The Sweet Spot for Most Mid-Market Companies: Longview Tax” Qwen 3.7 Flash · direct prompt · first choice
Also compared
Thomson Reuters ONESOURCE Tax Provision vs Thomson Reuters ONESOURCEThomson Reuters ONESOURCE Tax Provision vs Longview TaxBloomberg Tax Provision vs Thomson Reuters ONESOURCEBloomberg Tax Provision vs Longview TaxThomson Reuters ONESOURCE vs AvalaraThomson Reuters ONESOURCE vs VertexLongview Tax vs AvalaraLongview Tax vs VertexAll 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.