HalfGenius lets you ask ChatGPT, Gemini, and Claude at the same time — see all three answers side by side. A built-in Assistant synthesizes the responses and helps you go deeper. Ask each AI individually, or go straight to the Assistant — whatever fits your flow. Every conversation is stored in long-term memory via RAG, getting smarter over time. Your second brain — powered by the world's best AIs. All three separately costs $60/mo. HalfGenius gives you all three for a fraction of that.