Kimi K2 Thinking

moonshotai

A thinking model built on the Kimi K2 foundation with general agentic and reasoning capabilities, specializing in deep reasoning tasks. With a 262K context window, it combines chain-of-thought reasoning with tool calling for complex problem-solving. Supports automatic context caching, ToolCalls, JSON Mode, Partial Mode, and internet search.

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Capabilities

Tool Use

Extended Thinking

Example Use Cases

Deep reasoning tasks

Need thinking with agent capabilities

Complex multi-step reasoning

Technical Specifications

Context Window

262,144 tokens

Max Output

262,144 tokens

Cache Miss Cost

$0.60 per 1M tokens

Non-Reasoning Cost

$2.50 per 1M tokens

Cache Read Cost

$0.15 per 1M tokens

Web Search Cost

$15 per 1K calls

Code Execution Cost

$0.19 per 1K calls

⚠️ Legacy

Made legacy on

Reason

Superseded by Kimi K2.5

Recommended Replacement

Kimi K2.5