How to read this: Green check = feature supported. Red X = not supported. Click tool names to see full details. Data updates weekly.
Feature Claude Code OpenAI Codex GitHub Copilot CLI Cursor Google Antigravity Junie OpenCode Windsurf
Core Features
MCP Support
Offline Mode
Context Window 200k tokens 200k tokens 0k tokens 200k tokens 200k tokens 200k tokens 128k tokens 200k tokens
IDE Integration CLI only vscode vscode jetbrains neovim vscode web-ide intellij pycharm webstorm rider goland vscode jetbrains windsurf_editor jetbrains_plugin
Architecture
Implementation Language TypeScript Rust Go TypeScript TypeScript Java/Kotlin TypeScript TypeScript/Electron
License Proprietary Apache-2.0 Proprietary Proprietary Proprietary Proprietary MIT Proprietary
Skill/Command System .claude/commands .codex/skills
Installation Methods
npm
Homebrew
curl Install
Pricing
Free Tier Yes Limited daily usage Yes Included with ChatGPT Plus, Pro, Business, Edu, or Enterprise plan Yes 30-day free trial Yes 2,000 completions/month, 50 slow premium requests Yes 3 workspaces during preview Yes Limited requests during preview Yes 100 requests/day with local models, API keys required for cloud models Yes Trial credits, then paid plans required
Paid Tier(s) Claude Pro Claude for Work API Key ChatGPT Plus Copilot Individual Copilot Business Copilot Enterprise Pro Business Developer Program Pro Pro Pro Pro Ultimate Enterprise