# Rho vs Brex: which do AI models recommend for business banking, October 2026

Finance AI Recommendation Index, October 2026 Edition, Business banking. Two of fourteen models named Rho first on the direct prompt; zero named Brex. Page: https://finance-ai-index.com/treasury/business-banking/rho-vs-brex/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Rho | 12% | #2 of 14 | 0% | 13 | 10 of 14 |
| Brex | 4% | #7 of 14 | 9% | 22 | 12 of 14 |

## The direct prompt, model by model

- Gemini 3.5 Flash: rho first (first choices: Rho) (alternatives: Bank of America, Brex, Chase Business Banking, Mercury, Ramp)
- Perplexity Sonar: rho first (first choices: Rho) (alternatives: Airwallex, Brex, Capital One Enhanced Checking)
- Kimi K2: neither first, one named (first choices: Chase Performance Business Checking) (alternatives: Brex, Mercury, Relay)
- GLM 4.7 FlashX: neither first, one named (first choices: Mercury) (alternatives: Airwallex, Bank of America, Brex, Chase Business Banking)
- MiniMax M2.5: neither first, one named (first choices: PNC Bank) (alternatives: Capital One, First Internet Bank, Rho, Wise Business)
- Claude Haiku 4.5: neither named (first choices: Chase Business Banking) (alternatives: Bluevine Premier Business Checking, KeyBank, Relay)
- GPT-5.4 mini: neither named (first choices: J.P. Morgan Commercial Banking) (alternatives: Bank of America, Wells Fargo Commercial Banking)
- Grok 4.1 Fast: neither named (first choices: Chase Business Banking) (alternatives: Bank of America, Capital One)
- Mistral Small: neither named (first choices: Capital One) (alternatives: PNC Bank Treasury Enterprise Plan, Truist Bank, Wells Fargo)
- DeepSeek V4 Flash: neither named (first choices: Bank of America, Chase Business Banking) (alternatives: Capital One)
- Llama 4 Maverick: neither named
- Qwen 3.7 Flash: neither named (first choices: Ramp) (alternatives: Aspire, Bank of America, Chase Business Banking, Mercury, Oxygen Banking)
- GPT-6 Luna: neither named (first choices: J.P. Morgan Commercial Banking) (alternatives: Bank of America, Citibank, U.S. Bank)
- Muse Glimmer 30B: neither named (first choices: Bank of America, Chase Business Banking)

## What the models said about Rho

- "Choose Rho if your primary goal is to automate complex AP processes and vendor billing without paying software fees." (Gemini 3.5 Flash, paraphrase prompt, first choice)
- "I'd shortlist Rho first ... Rho is my starting recommendation for a mid-sized B2B company" (GPT-6 Luna, paraphrase prompt, first choice)
- "Rho is the strongest overall pick for many growing companies" (Perplexity Sonar, direct prompt, first choice)

## What the models said about Brex

- "I would generally recommend Brex if you want an all-in-one platform for banking, cards, treasury, and spend management" (Perplexity Sonar, paraphrase prompt, first choice)

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. Comparisons are drawn for the top eight products in each category. Published under CC BY 4.0; the output is the models' output, and nothing here is a recommendation by the index.