# Models.dev vs Undetectable AI

Models.dev records 200,451 monthly visits with -3.9% month-over-month growth and Free pricing. Undetectable AI records 3,113,403 monthly visits with +17.5% growth and Freemium pricing.

| Metric | [Models.dev](https://openaitools.app/tool/models-dev) | [Undetectable AI](https://openaitools.app/tool/undetectable-ai) |
| :--- | :--- | :--- |
| Website URL | https://models.dev | https://undetectable.ai |
| Categories | AI Models, AI API, Open Source AI Models, AI Tools Directory | AI Detector, AI Content Detector, AI Checker, Humanizer AI |
| Pricing Model | Free | Freemium |
| Monthly Visits | 200,451 | 3,113,403 |
| MoM Growth Rate | -3.9% | +17.5% |
| Primary Market | China | United States |
| Direct Visits | 136,316 | 2,336,720 |
| Review Score | 4.4 | 3.8 |
| Saved Count | 0 | 30 |
| Supported Platforms | Website | Website |

## Models.dev

Models.dev exists to answer a very practical developer question: which model should I use, and what will it cost? The site organises every entry under a canonical identifier in the form provider/model, so the same model served by several providers can be compared directly rather than guessed at. Columns cover context window, maximum output, whether input and output are supported, reasoning, tool calling, structured output, temperature control, open versus closed weights, price per million tokens, and release and update dates.

Because model releases move fast, the catalogue is built to stay current, with sortable and searchable tables that let you scan by lab or provider and filter down to what matters. Entries include both closed flagship models and open-weight alternatives, making it useful for cost planning as well as capability research.

The project is open source and free to use, and it is intended to be consumed programmatically. Developers can pull the catalogue into their own tooling through a JSON API or a type-safe SDK, which makes it a practical backend for dashboards, routing logic, or internal cost calculators rather than just a reference page to browse.

**Pricing & Plans:** Models.dev is free and open source. It is a reference database, so the prices it lists are the per-million-token rates charged by the model providers themselves, not a fee for using the site.

- **Canonical model identifiers:** Every model uses a consistent provider/model format so the same model across providers can be compared directly.
- **Specification comparison:** Side-by-side context window, output limit, reasoning, tool calling, structured output, and temperature support.
- **Pricing transparency:** Input and output prices per million tokens listed alongside release and update dates.
- **Open and closed models:** Covers closed flagship APIs and open-weight models from many labs in one sortable catalogue.
- **Developer access:** Consume the catalogue through a JSON API or a type-safe SDK for your own tools and dashboards.

**Strengths:** Free and open source with no account required; Consistent canonical identifiers make cross-provider comparison reliable; Covers pricing, limits, and capabilities in one sortable table; Available as a JSON API and type-safe SDK for programmatic use

**Limitations:** It is a reference catalogue, not an inference or hosting service; Data quality depends on community and maintainer updates keeping pace with releases; Interface is aimed at developers and offers little guidance for non-technical users

[Profile (Markdown)](https://openaitools.app/tool/models-dev.md)

## Undetectable AI

Undetectable AI focuses on a single practical problem: content that sounds machine-made can be penalized, flagged or distrusted. The platform's detector highlights which sentences a scanner would most likely mark as AI-generated, showing percentages before the humanizer even runs. Once flagged, the humanizer rewrites those segments with varied sentence structure, richer vocabulary and adjusted tone, aiming to keep the original meaning intact while producing writing that reads naturally.

Beyond the core text tools, the product range has expanded into media forensics. There are detectors for AI-generated images, voice, video and deepfakes, plus specialty utilities such as a fake PDF detector, a receipt checker and other document-verification tools. A Chrome extension brings detection and rewriting into Gmail, Google Docs and any other page you are typing on, and an API is offered for teams that want the humanizer embedded in their own workflows.

The platform reports more than 24 million users and supports 50+ languages, though English yields the most accurate results. Business Solutions add stricter data-retention controls, white-labeling and non-expiring credit packs for higher-volume clients. A free tier is available with limited words, and the vendor advertises a money-back guarantee when humanized output is still flagged.

**Pricing & Plans:** Freemium. A free trial covers a limited number of words (currently 250). Paid monthly plans start around $9.99 for 10K words and scale to roughly $42.50 for 50K words, while annual billing discounts those rates by about half (roughly $5.00-$21.25 per month). Custom business tiers add non-expiring credits, redistribution rights and priority support.

- **AI Detector:** Scans up to 5,000 words at a time and highlights the specific sentences most likely to be flagged as machine-written, so you can see your text the way a detector sees it.
- **AI Humanizer:** Rewrites AI-flagged passages with different sentence rhythms, vocabulary and tone, keeping your meaning while making the prose read like human writing.
- **Media authenticity checks:** Detectors for AI images, voice recordings, video and deepfakes, plus specialty document tools for checking whether a PDF or screenshot has been manipulated.
- **Chrome extension:** Detect and humanize directly inside Gmail, Google Docs or any web page without switching tabs.
- **API and business options:** An API lets teams plug humanizing into existing pipelines, while business plans offer white-labeling, higher volumes and non-expiring credits.

**Strengths:** Detector and humanizer live in one workflow, so you can flag and fix text without switching apps; Wide language coverage (50+ languages) with strong English accuracy; Extra media tools (image, audio, video, deepfake, fake PDF) beyond plain text; Chrome extension makes it usable inside the tools people already write in

**Limitations:** Detector results are probabilistic and can disagree with other detectors or with human reviewers; Free tier caps out at roughly 250 words, so any real workload needs a subscription; Word limits still apply even on paid tiers, so heavy publishing volumes require enterprise pricing; Humanized output sometimes needs a light manual edit to preserve nuance and technical accuracy

[Profile (Markdown)](https://openaitools.app/tool/undetectable-ai.md)

## Frequently Asked Questions

### How do Models.dev and Undetectable AI compare in monthly traffic?

Models.dev has 200,451 monthly visits, while Undetectable AI has 3,113,403. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

Models.dev has a month-over-month growth rate of -3.9%; Undetectable AI has +17.5%.

### How does pricing compare?

Models.dev: Free. Models.dev is free and open source. It is a reference database, so the prices it lists are the per-million-token rates charged by the model providers themselves, not a fee for using the site. Undetectable AI: Freemium. Freemium. A free trial covers a limited number of words (currently 250). Paid monthly plans start around $9.99 for 10K words and scale to roughly $42.50 for 50K words, while annual billing discounts those rates by about half (roughly $5.00-$21.25 per month). Custom business tiers add non-expiring credits, redistribution rights and priority support.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [ZeroGPT](https://openaitools.app/tool/zerogpt) | 32,864,541 | +19.7% | Freemium, Paid | AI content detection and a full writing toolkit in one place | [.md](https://openaitools.app/tool/zerogpt.md) |
| 2 | [GPTZero](https://openaitools.app/tool/gptzero-me) | 23,246,989 | +32.5% | Freemium, Paid | AI detection and writing verification built for schools and editors | [.md](https://openaitools.app/tool/gptzero-me.md) |
| 3 | [HumanizeAI.pro](https://openaitools.app/tool/humanizeai-pro) | 9,652,312 | +26% | Free | Features a streamlined browser-based humanizer for quick rewrites, but lacks deeper multi-model detection scoring dashboards. | [.md](https://openaitools.app/tool/humanizeai-pro.md) |
| 4 | [StealthWriter](https://openaitools.app/tool/stealthwriter) | 2,887,114 | +15.5% | Freemium | Offers multiple AI humanizing engines and side-by-side editing, but can occasionally produce repetitive phrasing in longer essays. | [.md](https://openaitools.app/tool/stealthwriter.md) |
| 5 | [Walter Writes AI](https://openaitools.app/tool/walter-ai) | 1,474,367 | +24.4% | Freemium | Provides dedicated humanization and detection checking in a single workflow, but has a smaller user community and fewer presets. | [.md](https://openaitools.app/tool/walter-ai.md) |
| 6 | [Getsolved.ai](https://openaitools.app/tool/getsolved-ai) | 1,250,296 | +96.6% | Freemium | Functions as a broad academic writing workspace with humanizing features, but is less fine-tuned specifically for bypassing detectors. | [.md](https://openaitools.app/tool/getsolved-ai.md) |
| 7 | [Phrasly](https://openaitools.app/tool/phrasly-ai) | 1,209,985 | +17.9% | Freemium, Subscription | Provides an intuitive humanizer and writing assistant suite, but has fewer advanced customization parameters for strict detector bypass. | [.md](https://openaitools.app/tool/phrasly-ai.md) |
| 8 | [WriteHuman](https://openaitools.app/tool/writehuman) | 619,492 | +15.6% | Freemium, Paid | Delivers simple browser-based AI text humanization, but lacks the advanced batch processing and API access of Undetectable. | [.md](https://openaitools.app/tool/writehuman.md) |
| 9 | [Humbot](https://openaitools.app/tool/humbot-ai) | 325,940 | -9.7% | Freemium | Combines text humanization with basic study tools and content detection, but offers less precise tone control during rewriting. | [.md](https://openaitools.app/tool/humbot-ai.md) |
| 10 | [StealthGPT](https://openaitools.app/tool/stealthgpt) | 290,918 | +14.2% | Paid | Specializes in aggressive rewriting to bypass rigorous enterprise detectors, though formatting can occasionally require manual cleanup. | [.md](https://openaitools.app/tool/stealthgpt.md) |

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Source: https://openaitools.app/compare/models-dev-vs-undetectable-ai

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