GitHub Copilot is an AI-powered code completion and programming assistant that helps developers write code faster and more efficiently. Powered by OpenAI's models including GPT-4, it provides real-time code suggestions, generates entire functions, explains code, and offers a conversational coding agent. The platform now offers five pricing tiers from free to enterprise, with access to premium AI models and advanced features.

Key Features:

• AI Code Completion: Real-time code suggestions and intelligent autocomplete
• Copilot Chat: Conversational AI for coding questions and debugging
• Coding Agent Mode: AI agent handles complex coding tasks autonomously
• Multi-Model Access: GPT-4, Claude, Gemini available on premium tiers
• Premium Requests: Advanced AI model usage with monthly allowances
• Multi-Language Support: Supports all major programming languages
• IDE Integration: VS Code, Visual Studio, JetBrains IDEs, Neovim
• Code Explanation: AI-powered code documentation and understanding
• Enterprise Features: Organization policies, usage analytics, security controls
• Free Tier for Students: Verified students get Copilot Pro free

Pricing: GitHub Copilot offers a free tier with 50 agent/chat requests and 2,000 completions monthly. Copilot Pro at $10/month provides unlimited completions. Copilot Pro+ at $39/month includes larger premium allowances. Business at $19/user/month, Enterprise at $39/user/month.

Alternatives:

• Amazon CodeWhisperer - AWS code assistant
• Tabnine - AI code completion platform
• Codeium - Free AI coding assistant
• Cursor - AI-first code editor
• Replit Ghostwriter - AI pair programmer