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Code Arena records 35,827,928 monthly visits with +19.4% month-over-month growth and Free pricing. Formation records 82,420 monthly visits with -16.6% growth and Paid pricing.
Battle-test AI coding models side by side
Adaptive interview prep and mentorship for experienced software engineers
| Dimension / Metric | | |
|---|---|---|
| Official Domain | arena.ai | formation.dev |
| Pricing Model | Free | Paid |
| Monthly Visits | 35.83M (35,827,928) | 82.42K (82,420) |
| MoM Traffic Delta | +5.83M (+19.4%) | -16.39K (-16.6%) |
| Primary Market & Share | 🇮🇳 India (13.1%) | 🇺🇸 United States (59.6%) |
| Direct Visits / mo | 24.34M | 63.81K |
| User Rating | 5 | 5 |
| 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.
Adaptive interview prep and mentorship for experienced software engineers
Practice recalibrates each session, getting harder as you improve so hours go where your target rounds demand.
Get matched with mentors and hiring managers who run interviews at the companies you're targeting.
Prepare for data structures and algorithms, system design, AI-assisted coding, behavioral rounds, and more.
Solo, one-on-one, or small-group mocks plus career coaching and negotiation support.
High-efficiency open-weight and hosted reasoning AI powered by DeepSeek-V4 and R1 at ultra-low token costs.
Alibaba Cloud's 4th-generation multimodal AI assistant and foundation model lineup (Qwen4-Max, Qwen4-Plus, Qwen4-Flash & open-weight Qwen4-27B) with 1M context.
Build and share random generators for free with lists and simple code
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Describe your idea and Replit builds a working app in minutes
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Prompt to working full-stack web app, published in seconds
