Panelize

Panelize is a Chrome extension that allows users to send one prompt and receive side-by-side AI responses from multiple models including ChatGPT, Claude, Gemini, Grok, DeepSeek, Kimi, Qwen, and others. It supports multiple layout options, does not require API keys, uses session logins, and keeps data private by running entirely in the browser. It is free, open source, and designed for productivity and AI comparison without tab switching.