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Mini toolsKimi K2 Thinking
By Moonshot AI
Moonshot describes Kimi K2 Thinking as its most capable open-source thinking model, optimized for step-by-step reasoning with stable tool use over very long action chains. The model is designed for agentic problem solving, with reported strength on benchmarks such as Humanity’s Last Exam and BrowseComp, while also using native INT4 quantization to reduce inference cost and memory usage. Its 256k context window and focus on sustained reasoning make it more suitable for deliberate agents than ordinary low-latency chat.
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Overview
Kimi K2 Thinking is Moonshot AI’s open-source reasoning-oriented K2 variant, built for deep multi-step thinking and tool use. It uses native INT4 quantization, supports a 256k context window, and is aimed at long-horizon agentic workflows rather than fast reflex chat.
About Moonshot AI
Moonshot AI is a Beijing-based Chinese AI startup (founded 2023) focused on developing large language models and multimodal systems
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Last updated: March 27, 2026
