ChatTab

ChatTab is a native macOS app that brings OpenAI’s ChatGPT models—including GPT‑3.5, GPT‑4, GPT‑4‑Vision, and Claude 2—directly to your desktop. Enjoy a fast, low‑memory interface with markdown‑rich chat, multiple tabs, keyboard shortcuts, and iCloud sync for prompts and settings. API keys are stored securely in the Apple Keychain and all data stays local, giving writers, developers, and power users a private, offline‑friendly AI chat experience.