Tangent – Threaded Chat for ChatGPT & Claude

Branch off into side threads without leaving your main Claude or ChatGPT conversation

The Chrome extension that adds parallel threads and split-screen chat to ChatGPT and Claude. You're in a ChatGPT or Claude conversation and it finally clicks — the AI just gave you the clearest explanation you've ever read on a topic. Then you have a follow-up question. You type it. The thread grows. You scroll back up to re-read the original. Then another question. More scrolling. More noise. The insight you were building on is now buried, and your concentration is gone. Tangent is the ChatGPT and Claude extension that solves this. Open a parallel chat thread — right next to your main conversation — without leaving the page, opening a new tab, or losing your place. --- What Tangent gives you on ChatGPT and Claude: Branch off from any message. Run parallel conversations simultaneously. Keep your main thread clean while you explore sub-topics, chase rabbit holes, and ask follow-up questions in dedicated side threads. When you're done, close the thread or minimize it to a tab and jump right back — the original text flashes to remind you exactly where you branched off. This is split-screen AI chat. Multithreaded conversations. Parallel thinking — without the tab chaos. --- How to use Tangent on ChatGPT or Claude: - Highlight any text in a ChatGPT or Claude conversation - Click "Open Thread" on the floating button that appears - A side panel opens with a fresh, temporary ChatGPT or Claude session - Your highlighted context is auto-pasted — no copy-pasting, no friction - Press Cmd+\ to open a blank parallel thread anytime - Minimize threads to a tab strip at the bottom; restore with one click - The original passage highlights when you return so you never lose your place --- Built for: - ChatGPT and Claude power users who think in branches, not lines - Students using AI chat to work through papers, textbooks, or documentation - Developers debugging, learning APIs, and exploring concepts in parallel threads - Writers, analysts, and researchers juggling multiple lines of inquiry at once - Anyone who has ever lost their place in a ChatGPT or Claude conversation --- Features: - Parallel chat threads on ChatGPT and Claude — multiple simultaneous side panels - Split-view AI conversation — main thread stays intact while you branch off - Auto-paste context — selected text lands in the new thread automatically - Temporary sessions — no chat history pollution, no sidebar clutter - Thread tab bar — minimize any panel to a compact tab, restore instantly - Visual scroll-back — source text highlights when you re-expand a thread - Keyboard shortcuts: Cmd+\ for a blank thread, Escape to minimize - Drag and resize panels freely - Works on chatgpt.com and claude.ai — same experience on both platforms --- Why Tangent? ChatGPT and Claude are the most powerful thinking tools ever built — but they're trapped in a single-thread, linear chat format that fights against the way your brain actually works. Real thinking is nonlinear. Ideas branch. Questions spawn sub-questions. Tangent gives ChatGPT and Claude the threading model they were always missing: parallel, branching, non-destructive side conversations that live next to your main thread without polluting it. Stop linearizing your thinking to fit the chat box. Branch off. Explore. Come back. The only Chrome extension for threaded, parallel, split-screen conversations on both ChatGPT and Claude. No new accounts, no API keys, no subscriptions — works with your existing ChatGPT or Claude plan. Fully open source. Zero data collection.