One of fourteen models named Avalara first on the direct prompt; zero named CSC Corptax Accounting for Income Taxes. Avalara was named by eleven of the fourteen models and CSC Corptax Accounting for Income Taxes by twelve and Avalara carries 19 labels and CSC Corptax Accounting for Income Taxes 28, so the shares are not directly comparable.
Named in four categories this edition.
Named in one category this edition.
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.
Across every category in the November 2026 Edition, Avalara and CSC Corptax Accounting for Income Taxes were named in the same answer fourteen times, of the 78 answers naming Avalara and the 94 naming CSC Corptax Accounting for Income Taxes. In those answers CSC Corptax Accounting for Income Taxes took the first choice one time and Avalara zero.
| Model | Direct | Paraphrase | Comparative | Budget-constrained | Scale-constrained | Negative |
|---|---|---|---|---|---|---|
| Claude Haiku 4.5 | ||||||
| GPT-5.4 mini | ||||||
| Gemini 3.5 Flash | CC | CC | CC | CC | CC | CC |
| Perplexity Sonar | CC | |||||
| Grok 4.20 | CC | |||||
| Mistral Small | CC | |||||
| DeepSeek V4 Flash | CC | |||||
| Llama 4 Maverick | CC | |||||
| Qwen 3.7 Flash | CC | |||||
| Kimi K2 | CC | CC | ||||
| GLM 4.7 FlashX | CC | |||||
| MiniMax M2.5 | CC | CC | ||||
| GPT-6 Luna | ||||||
| Muse Glimmer 30B | CC | CC |
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.
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Six of seven in this category shown.
“Avalara should generally not be treated as a primary ASC 740 provision tool” Perplexity Sonar · comparative prompt · hard negative
“it's not primarily a corporate income tax compliance tool... it shouldn't be your primary income tax compliance system” DeepSeek V4 Flash · paraphrase prompt · soft negative
“Cons: Primarily focused on indirect tax, not corporate income tax.” Qwen 3.7 Flash · paraphrase prompt · soft negative
“I recommend Avalara as the top choice for comprehensive income tax compliance and related regulatory needs” Grok 4.20 · paraphrase prompt · first choice
“Avalara would be my primary recommendation because it specifically addresses B2B compliance needs” MiniMax M2.5 · paraphrase prompt · first choice
“Thomson Reuters ONESOURCE Tax Provision and Avalara are the top choices” GLM 4.7 FlashX · direct prompt · first choice
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 as a first choice on a tight budget: ONESOURCE, CSC Corptax, and similar enterprise suites” Perplexity Sonar · budget prompt · hard negative
“Avoid ONESOURCE and Corptax unless you have a Fortune-500-style tax department.” Muse Glimmer 30B · negative prompt · hard negative
“should be avoided or used with caution include: ... Corptax” Llama 4 Maverick · negative prompt · hard negative
“Choose CSC Corptax or ONESOURCE if you have a dedicated in-house corporate tax manager needing end-to-end provision and return automation.” Gemini 3.5 Flash · paraphrase prompt · first choice
“Choose ONESOURCE or Corptax for a broad corporate-tax platform” Perplexity Sonar · comparative prompt · first choice
“Often recommended for companies that want to combine their provision work with state/federal return preparation in one place.” Qwen 3.7 Flash · direct prompt · alternative
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.