Features
Interactive browser-based code playground
AI personal tutor for code explanation and debugging
Courses in 20+ programming languages
Streak tracking and daily habit gamification
Global leaderboards and friendly competition
Shareable certificates upon course completion
Built-in code editor with test cases and console
Free developer tools: formatters, converters, generators
Embeddable code editor for third-party websites
Cheat sheets for Git and programming languages
Algorithm and data structure visualizations
Mobile apps for iOS and Android (4.9-star ratings)
Audio narration for lessons
Quiz and reference mode for self-testing
Team plan for business onboarding and tracking
Official LLM leaderboard and ranking
Battle Mode for side-by-side model comparison
Agent Mode for real-world agent evaluation
Multimodal Max for multimodal model testing
Code Arena with web development challenge categories
BullshitBench for nonsense detection evaluation
File upload for third-party AI processing
Public conversation sharing for community research
Leaderboard dataset publicly available
Monthly arena updates across product and research
Search functionality for models and conversations
Community voting on model responses
