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Claude is Anthropic's flagship AI assistant, known for producing nuanced, thoughtful responses and handling extremely long documents with its 200,000-token context window. It excels at writing, summarizing, coding, and in-depth analysis, and consistently scores at the top of reasoning benchmarks. Claude is designed with safety and honesty as core principles. The free tier gives access to Claude 3.5 Sonnet with daily message limits. The Pro plan unlocks higher usage, priority access during peak times, and access to the latest models including Claude 3 Opus. Projects let you give Claude persistent context and uploaded files to work from across sessions.

ChatGPT is OpenAI's consumer AI product and the most widely used AI assistant in the world. It runs on GPT-4o, which handles text, images, audio, and video inputs, and integrates DALL-E 3 for image generation directly in the chat. The free tier is generous; Plus unlocks faster responses, higher limits, and access to the full GPT-4o model. Custom GPTs let you build specialized assistants with specific instructions and knowledge bases. The Pro plan ($200/mo) adds unlimited access and o1 pro mode — OpenAI's most capable reasoning model — making it the go-to for researchers and power users who need maximum throughput.

Cursor is an AI-first code editor built on VS Code. Unlike Copilot (a plugin), Cursor is the entire editor — which allows it to have deeper AI integration. Its standout features are multi-file editing (Composer), codebase chat (ask questions about your entire repo), and the ability to apply AI edits across multiple files at once.

GitHub Copilot is the industry-standard AI coding assistant, used by millions of developers. It integrates seamlessly with VS Code, JetBrains IDEs, and more, providing inline code suggestions, multi-line completions, and a chat interface. Copilot Chat can explain code, generate tests, and answer coding questions directly in your editor.