High-efficiency open-weight and hosted reasoning AI powered by DeepSeek-V4 and R1 at ultra-low token costs.
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Code Arena records 35,827,928 monthly visits with +19.4% month-over-month growth and Free pricing. Dechecker records 111,347 monthly visits with +4.2% growth and Freemium pricing.

Free AI content detector that flags machine-written text and helps you rewrite it
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | arena.ai | dechecker.ai |
| Pricing Model | Free | Freemium |
| Monthly Visits | 35.83M (35,827,928) | 111.35K (111,347) |
| MoM Traffic Delta |
| +5.83M (+19.4%) |
| +4.49K (+4.2%) |
| Primary Market & Share | 🇮🇳 India (13.1%) | 🇺🇸 United States (43.4%) |
|---|
| Direct Visits / mo | 24.34M | 26.47K |
|---|
| User Rating | 4.7 | 3.8 |
|---|
| Supported Platforms | Website | Website |
|---|

Battle-test AI coding models side by side
Send the same coding prompt to multiple leading models and compare their generated apps and logic side by side.
Watch models construct web apps and websites live, so you can see process and output, not just the final file.
Projects go beyond one-off snippets, testing how well a model structures components, routes, and styles together.
Track which coding models accumulate the most wins over time to identify consistently strong performers.

Free AI content detector that flags machine-written text and helps you rewrite it
The checker returns an overall AI probability plus a per-sentence breakdown, so you can see exactly which lines read as machine-written instead of guessing from a single number.
Flagged sentences come with an explanation of what triggered the flag and one-click rewrite suggestions that reduce tell-tale AI patterns while keeping your meaning.
Optional plagiarism, grammar and fact-check modules can be layered onto the same text, turning a single submission into a broader originality and quality review.
Paste text directly or upload files, and scan multiple documents in one pass when you are reviewing a stack of papers or drafts.
High-efficiency open-weight and hosted reasoning AI powered by DeepSeek-V4 and R1 at ultra-low token costs.

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Build working apps, websites, and AI agents by describing them
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