Kimi (kimi.com) by Moonshot AI is a leading Chinese AI assistant in 2026, powered by Kimi K2 Thinking—the top open-source reasoning model with 1T parameters (32B active). It excels in long-context (2M+ characters), real-time web search, autonomous tool use/agentic workflows, coding, math/logic reasoning, and multimodal capabilities. Free unlimited chat with generous limits, plus affordable paid/API plans—ideal for students, developers, researchers, and professionals seeking powerful, cost-effective AI.