Definio AI: Multi-Modal AI Sidebar

Tracking since Apr 19, 2026.

Changelog

• May 9, 2026
  description

  Access all premium AI models in one convenient sidebar. Chat with Claude Opus 4.1, Sonnet 4.5, GPT-5.1, Gemini 2.5 and more.
  
  Definio AI is a powerful AI assistant that brings multiple language models together in a single browser extension—helping you explore, reason, and research faster, directly within your browsing flow.
  
  🚀 CHAT WITH THE TOP AI MODELS – ALL IN ONE PLACE:
  - Anthropic: Claude Opus 4.1, Claude Sonnet 4.5, Claude Haiku 4.5
  - OpenAI: GPT-5.1, GPT-5.1 Chat, GPT-5, GPT-5 Chat, GPT-5 Mini, GPT-5 Nano, GPT-4.1, GPT-4.1 Mini, GPT-4.1 Nano
  - Google: Gemini 2.5 Pro, Gemini 2.5 Flash, Gemini 2.5 Flash Lite
  
  🧠 ASK BETTER QUESTIONS, GET SMARTER ANSWERS:
  Select any text on a page and start a conversation with multiple AI agents at once. Cross-check facts, get diverse insights, or bring specialised models into the discussion—right from your browser sidebar.
  
  ⚡ BUILT FOR DEEP THINKING AND FAST WORK:
  Use AI to break down dense content, summarize complex topics, compare perspectives, or brainstorm ideas—all without switching tabs. Definio adapts to your browsing context for precise, real-time assistance.
  
  🔄 YOUR AI WORKFLOW, SUPERCHARGED:
  Whether you're a student, researcher, or professional, Definio helps you turn questions into knowledge. Use customizable shortcuts to boost productivity—summarize articles, extract key points, or auto-respond to content.
  
  💡 WHY DEFINIO?
  Unlike traditional AI chatbots, Definio lets you bring multiple minds into the room. It's not about one model's opinion—it's about reaching clarity through comparison, consensus, and control.
  
  📝 Whether you're researching, learning, or need quick explanations — Definio AI Chat is your intelligent companion right in your browser.
  
  🔍 USAGE TIPS:
  
  Multiple Access Options:
  - Keyboard Shortcut: Press Alt+Shift+O (default shortcut, customizable in Chrome extensions settings) to open the AI Chat side panel instantly
  - Right-click Menu: Right-click anywhere on any webpage and select "Open Chat" to launch the AI Chat side panel
  - Extension Icon: Click the Definio AI extension icon in your browser toolbar to open the side panel
  
  Quick Access Methods:
  - Once the side panel is open, you can select any text on the page to automatically send it to the AI Chat for analysis or questions
  - Use the right-click "Open Chat" option for instant access without needing to select text first
  - The side panel stays open as you navigate between different websites, keeping your chat history accessible
  
  Chrome Limitations:
  - ⚠️ The extension does not work with PDF files viewed in the browser
  - ⚠️ For best experience with text selection, open the side panel first and then select the text you want to discuss with AI
  
  🛡️ WHY A SIDE PANEL?
  
  - Privacy First: Unlike popup extensions, Definio AI works in its own dedicated space without injecting content into web pages
  - Non-Intrusive Design: The side panel never covers or alters the content you're reading
  - Better Workflow: Ask questions about what you're reading without losing your place in the text or having floating boxes interrupt your flow
  - Persistent Chat: Keep your AI conversation visible while continuing to read and navigate the web
  - Seamless Integration: Instantly discuss any text you encounter while browsing

  Access all premium AI models in one convenient sidebar. 
  
  Definio AI is a powerful AI assistant that brings multiple language models together in a single browser extension—helping you explore, reason, and research faster, directly within your browsing flow.
  
  🚀 CHAT WITH THE TOP AI MODELS – ALL IN ONE PLACE:
  Models from all major providers. 
  
  🧠 ASK BETTER QUESTIONS, GET SMARTER ANSWERS:
  Select any text on a page and start a conversation with multiple AI agents at once. Cross-check facts, get diverse insights, or bring specialised models into the discussion—right from your browser sidebar.
  
  ⚡ BUILT FOR DEEP THINKING AND FAST WORK:
  Use AI to break down dense content, summarize complex topics, compare perspectives, or brainstorm ideas—all without switching tabs. Definio adapts to your browsing context for precise, real-time assistance.
  
  📷 COMPUTER VISION & SCREENSHOTS:
  Capture the active tab or snip a region with one click and drop it straight into the chat. Vision-capable models read the screenshot for you—ask "what does this chart say," "translate this menu," "what's broken in this UI," or "summarise the page I just captured." You can also drop in your own image files (PNG, JPG, WebP) and combine selected text, screenshots, and typed questions in the same message for richer prompts.
  
  ⌨️ CHAT SHORTCUTS – TYPE "/" TO RUN COMMANDS:
  - /new — start a new chat
  - /model — switch the AI model mid-conversation
  - /search — toggle web search on or off
  - /think — toggle extended thinking on or off
  - /theme — flip between dark and light mode
  - /capture — screenshot the visible tab
  - /snip — screenshot a region you draw
  Plus Alt+Shift+O (Option+Shift+O on Mac) to open the side panel from anywhere—rebindable in chrome://extensions/shortcuts.
  
  🔄 YOUR AI WORKFLOW, SUPERCHARGED:
  Whether you're a student, researcher, or professional, Definio helps you turn questions into knowledge. Use customizable shortcuts to boost productivity—summarize articles, extract key points, or auto-respond to content.
  
  💡 WHY DEFINIO?
  Unlike traditional AI chatbots, Definio lets you bring multiple minds into the room. It's not about one model's opinion—it's about reaching clarity through comparison, consensus, and control.
  
  📝 Whether you're researching, learning, or need quick explanations — Definio AI Chat is your intelligent companion right in your browser.
  
  🔍 USAGE TIPS:
  
  Multiple Access Options:
  - Keyboard Shortcut: Press Alt+Shift+O (default shortcut, customizable in Chrome extensions settings) to open the AI Chat side panel instantly
  - Right-click Menu: Right-click anywhere on any webpage and select "Open Chat" to launch the AI Chat side panel
  - Extension Icon: Click the Definio AI extension icon in your browser toolbar to open the side panel
  
  Quick Access Methods:
  - Once the side panel is open, you can select any text on the page to automatically send it to the AI Chat for analysis or questions
  - Use the right-click "Open Chat" option for instant access without needing to select text first
  - The side panel stays open as you navigate between different websites, keeping your chat history accessible
  
  Chrome Limitations:
  - ⚠️ The extension does not work with PDF files viewed in the browser
  - ⚠️ For best experience with text selection, open the side panel first and then select the text you want to discuss with AI
  
  🛡️ WHY A SIDE PANEL?
  
  - Privacy First: Unlike popup extensions, Definio AI works in its own dedicated space without injecting content into web pages
  - Non-Intrusive Design: The side panel never covers or alters the content you're reading
  - Better Workflow: Ask questions about what you're reading without losing your place in the text or having floating boxes interrupt your flow
  - Persistent Chat: Keep your AI conversation visible while continuing to read and navigate the web
  - Seamless Integration: Instantly discuss any text you encounter while browsing

• May 9, 2026
  short_description

  Access Claude Opus 4.1, Sonnet 4.5, Haiku 4.5, GPT-5.1, GPT-5, GPT-4.1, Gemini 2.5 Pro and more AI models in one convenient sidebar.

  Definio runs every LLM model from one sidebar. Throw your question at any of them, switch on a whim, never open a new tab.

• May 9, 2026
  name

  Definio AI: Multi-modal AI Sidebar GPT-5.1, Claude Opus 4.1, Sonnet 4.5

  Definio AI: Multi-Modal AI Sidebar

• May 9, 2026
  host_permissions

  (empty)

  https://definio.org/*, https://ai.definio.org/*

• May 9, 2026
  permissions

  sidePanel, contextMenus, windows, storage

  storage, sidePanel, tabs, activeTab, scripting

• Apr 19, 2026
  permissions

  sidePanel, contextMenus, windows

  sidePanel, contextMenus, windows, storage

Permissions & access

Permissions

storagesidePaneltabsactiveTabscripting

Host access

https://definio.org/*, https://ai.definio.org/*

Screenshots

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