Kimi K2 Thinking

Kimi K2 Thinking

Kimi K2 Thinking is Moonshot AI's most advanced open reasoning model to date, extending the K2 series into agentic, long-horizon reasoning. Built on the trillion-parameter Mixture-of-Experts (MoE) architecture introduced in Kimi K2, it activates 32 billion parameters per forward pass and supports 256K-token context windows. The model is optimized for persistent step-by-step thought, dynamic tool invocation, and complex reasoning workflows that span hundreds of turns. It interleaves step-by-step reasoning with tool use, enabling autonomous research, coding, and writing that can persist for hundreds of sequential actions without drift.

ConversationReasoningCode GenerationAnalysisTool Use
Provider
Moonshotai
Release Date
2025-11-06
Size
XLARGE
Parameters
1T (32B active)

Benchmark Performance

Performance metrics on industry standard AI benchmarks that measure capabilities across reasoning, knowledge, and specialized tasks.

HLE

State-of-the-art
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BrowseComp

State-of-the-art
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SWE-Multilingual

State-of-the-art
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LiveCodeBench

State-of-the-art
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Model Insights

All Model Responses

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