Second Brain is an AI-powered research, planning, and productivity platform that lets you build an “AI visual board”—a knowledge base where you can upload documents, articles, videos, audio, GitHub repos, websites, ChatGPT responses, and more, then interact conversationally with all your content. Backed by GPT‑4.5, Claude, Grok 3, DeepSeek R1, and similar top-tier AI models, Second Brain enables instant summarization, searchable Q&A, multilingual interaction (e.g., chat in English with Spanish content), and automated transformation of text into natural, undetectable human‑sounding copy. You can save AI chat responses as richly formatted, shareable pages, then continue building on them with headings, to‑do lists, images, code blocks, or links. A Chrome extension lets you capture web pages, text, images, screenshots, and ChatGPT outputs in one click for instant organization.