Mnemosphere is an AI-first research workspace that aggregates frontier large language models into one interface so you can run multimodel chats, stream and compare answers side-by-side, fire parallel prompts, run multi-platform deep research (OpenAI, Gemini, Perplexity), auto-critique model replies, turn answers into interactive mindmaps, analyze YouTube transcripts, and annotate linked highlights and notes — with each model aware of the others’ outputs; use it to speed up and de-risk research, pressure-test ideas across diverse model perspectives, avoid vendor lock-in, and turn long AI outputs into searchable, visual insights (your data isn’t used to train the models).