# Smarty vs Google Address Validation API: which do AI models recommend for address verification, October 2026

GTM AI Recommendation Index, October 2026 Edition, Address verification tools. Nine of fourteen models named Smarty first on the direct prompt; zero named Google Address Validation API. Page: https://gtm-ai-index.com/gtm-data/address-verification/smarty-vs-google-address-validation-api/

| | First-choice share | Rank | Negative rate | Labels | Models naming it |
|---|---|---|---|---|---|
| Smarty | 47% | #1 of 7 | 0% | 61 | 14 of 14 |
| Google Address Validation API | 4% | #5 of 7 | 10% | 10 | 8 of 14 |

## The direct prompt, model by model

- Perplexity Sonar: smarty first (first choices: Smarty) (alternatives: Loqate, Melissa, PostGrid Address Verification)
- Grok 4.1 Fast: smarty first (first choices: Smarty) (alternatives: Melissa, PostGrid Address Verification)
- DeepSeek V4 Flash: smarty first (first choices: Smarty) (alternatives: Loqate, Melissa, PostGrid Address Verification)
- Qwen 3.7 Flash: smarty first (first choices: Smarty) (alternatives: Loqate, Melissa)
- Kimi K2: smarty first (first choices: Smarty) (alternatives: Loqate, Melissa Global Address Verification)
- GLM 4.7 FlashX: smarty first (first choices: Smarty) (alternatives: Experian Address Validation, Melissa, PostGrid Address Verification)
- MiniMax M2.5: smarty first (first choices: Smarty) (alternatives: Melissa, PostGrid Address Verification)
- GPT-6 Luna: smarty first (first choices: Smarty) (alternatives: Lob, Loqate, Melissa)
- Muse Glimmer 30B: smarty first (first choices: Loqate by gbg, Smarty) (alternatives: Melissa Address Verification)
- Claude Haiku 4.5: neither first, one named (first choices: PostGrid Address Verification) (alternatives: Informatica Data as a Service, Melissa Address Verification, Smarty)
- GPT-5.4 mini: neither first, one named (first choices: Melissa Global Address Verification) (alternatives: Experian Address Verification, PostGrid Address Verification, Smarty)
- Gemini 3.5 Flash: neither first, one named (first choices: Loqate) (alternatives: Lob, Melissa, PostGrid Address Verification, Smarty)
- Mistral Small: neither named (first choices: Experian Address Validation, Melissa Global Address Verification) (alternatives: Loqate, PostGrid Address Verification)
- Llama 4 Maverick: neither named

## What the models said about Smarty

- "Smarty (formerly SmartyStreets) is a fast and highly scalable address verification API used heavily in high-volume e-commerce and logistics environments." (Muse Glimmer 30B, comparative prompt, first choice)
- "I would recommend Smarty if your volume is mostly U.S. addresses and you want a developer-friendly API with strong validation tooling" (Perplexity Sonar, paraphrase prompt, first choice)
- "### 1. Smarty (formerly SmartyStreets)
- Best for: US address verification, developer-friendly implementations, e-commerce checkout" (Kimi K2, comparative prompt, first choice)

## What the models said about Google Address Validation API

- "Generally not CASS-certified, so less ideal for postal compliance needs" (DeepSeek V4 Flash, comparative prompt, soft negative)
- "I'd typically recommend starting with Google Address Validation or Melissa" (MiniMax M2.5, paraphrase prompt, first choice)
- "1. Google Address Validation API — Best Free Ongoing Option" (Kimi K2, budget prompt, first choice)
- "U.S. ecommerce checkout: Compare Smarty and Google" (GPT-6 Luna, comparative 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.