# Upflow vs Lunos: which do AI models recommend for cash application, September 2026

Finance AI Recommendation Index, September 2026 Edition, Cash application. Two of twelve models named Upflow first on the direct prompt; zero named Lunos. Page: https://finance-ai-index.com/receivables/cash-application/upflow-vs-lunos/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Upflow | 9% | #3 of 10 | 0% | 13 | 7 of 12 |
| Lunos | 7% | #4 of 10 | 0% | 11 | 6 of 12 |

## The direct prompt, model by model

- Mistral Small: upflow first (first choices: Upflow) (alternatives: Bluecopa, Cashbook, Chaser)
- Llama 4 Maverick: upflow first (first choices: Upflow) (alternatives: Bluecopa, Cashbook, Chaser, Lunos)
- Claude Haiku 4.5: neither first, one named (first choices: Versapay) (alternatives: Billtrust, Paystand, Quadient Accounts Receivable, Upflow)
- Gemini 3.5 Flash: neither first, one named (first choices: Quadient Accounts Receivable) (alternatives: Stuut, Tesorio, Upflow, Versapay)
- Perplexity Sonar: neither first, one named (first choices: HighRadius) (alternatives: Billtrust, Kolleno, Upflow)
- GPT-5.4 mini: neither named (first choices: HighRadius) (alternatives: BlackLine Cash Application, Sidetrade)
- Grok 4.1 Fast: neither named (first choices: Esker) (alternatives: Billtrust, Gaviti, HighRadius, Quadient Accounts Receivable)
- DeepSeek V4 Flash: neither named (first choices: Esker, HighRadius) (alternatives: Gaviti, Monk, Versapay)
- Qwen 3.7 Flash: neither named (first choices: HighRadius) (alternatives: AtoBi, BlackLine Cash Application, Trintech)
- Kimi K2: neither named (first choices: HighRadius) (alternatives: Billtrust, Chaser, Versapay)
- GLM 4.7 FlashX: neither named (first choices: Esker, Kolleno) (alternatives: Chaser, Gaviti, Monk, Quadient Accounts Receivable, Serrala, Stuut, Transparency / Transformance, Versapay)
- MiniMax M2.5: neither named (first choices: HighRadius) (alternatives: Monk)

## What the models said about Upflow

- "Upflow - Good fit for mid-sized and scaling companies (typically $10M-$500M revenue) that need cash application to feed directly into AR and collections" (Llama 4 Maverick, direct prompt, first choice)
- "Upflow is often recommended as the best overall solution due to its seamless integration with collections and AR workflows" (Mistral Small, direct prompt, first choice)

## What the models said about Lunos

- "Best Pay-As-You-Go Solution: Lunos ... "I want zero monthly risk." | Lunos" (Qwen 3.7 Flash, budget prompt, first choice)
- "Lunos (backed by GoCardless/General Catalyst) is the strongest fit for mid-market" (DeepSeek V4 Flash, paraphrase prompt, first choice)
- "Lunos – Best overall for a free/very low-cost start" (DeepSeek V4 Flash, budget prompt, first choice)

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. 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.