BILL vs AvidXchange
Seven of twelve models named BILL first on the direct prompt; one named AvidXchange. BILL was named by twelve of the twelve models and AvidXchange by eleven and BILL carries 51 labels and AvidXchange 25, so the shares are not directly comparable.
Named in twelve categories this edition.
Named in eight categories this edition.
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 business bill pay page.
By framing
BILLFirst choices, of twelve modelsAvidXchange
Across every category in the September 2026 Edition, BILL and AvidXchange were named in the same answer 110 times, of the 650 answers naming BILL and the 135 naming AvidXchange. In those answers AvidXchange took the first choice four times and BILL twenty-four.
Every model, every framing
| 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 | |
BILL AvidXchange first choice named as an alternative argued againstblank: not namedEach cell is one answer, BILL on the left and AvidXchange on the right.The direct prompt
Both were the first choice
1 of 12 modelsThe answer named them together, and the judge labeled each a first choice.BILL first, AvidXchange an alternative
6 of 12 modelsAvidXchange was named in the answer but not as the choice, or not at all.Neither was the first choice, one was named
4 of 12 modelsThe answer put something else first and named one of the two as an alternative.Neither was named
1 of 12 modelsThe answer made no first choice from these two in this category.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
BILL23%#2 of 7AvidXchange0%#– of 7BILL35%#1 of 10AvidXchange2%#6 of 10What the models said about BILL
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. Four of four in this category shown.
“BBB rating 1.09/5 (108+ reviews), 188 complaints in 3 years. Common issues: payment delays/holds, poor customer support, unauthorized charges” Grok 4.1 Fast · negative prompt · hard negative
“BILL is widely adopted by nearly half a million businesses, with users citing improved visibility, faster reconciliation, and reduced manual work” Claude Haiku 4.5 · paraphrase prompt · first choice
“For most mid-market B2B companies, BILL is the top choice due to its scalability, broad payment options, and strong AP automation features.” Mistral Small · direct prompt · first choice
“BILL is the heavyweight market leader... It offers the most robust internal controls, audit trails, and customizable approval workflows.” Gemini 3.5 Flash · comparative prompt · first choice
What the models said about AvidXchange
Every negative label with a quote, up to three, then the highest-weighted positives, up to three. One of one in this category shown.
“For most mid-market B2B companies, BILL or AvidXchange seem to be the most widely recommended” MiniMax M2.5 · direct prompt · first choice
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.