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Kimi K3

Ultra Long-Context Dynamic Attention Transformer
Official Source & Paper
Moonshot AI logo Moonshot AI 📄 Cloud API / Web Platform 🌍 China (China) 🗓️ Effective Date: 14.08.2026

Moonshot AI's flagship 4-million-token model offering needle-in-a-haystack retrieval and cross-document reasoning with zero degradation.

Model Size / Parameters Proprietary Frontier Architecture: Ultra Long-Context Dynamic Attention Transformer
Context Window (Input) 4M tokens Token Capacity
Max Output Tokens 64k tokens Single Generation Limit
Supported Modalities Text, Code, Vision, Documents Native Multimodal Ingestion
License & Access Cloud API / Web Platform Open Weights vs. API
Release Date August 2026 Effective Date: 14.08.2026

Verified Benchmark Results

Standardized academic and industry evaluation benchmarks (Effective Date: 14.08.2026).

MMLU-Pro / 5-Shot General Intellect
91.8%
SWE-bench Verified Software Engineering
64.5%
MATH 500 / AIME Mathematical Reasoning
94.1%
GPQA Diamond Doctoral Science
75.2%
HumanEval / Python Algorithm Synthesis
92.0%

Pricing & Cost Efficiency

Official API token pricing and self-hosted licensing terms.

Input Pricing (Prompt)
$0.80 / 1M tokens
Per 1 million processed tokens
Output Pricing (Generation)
$2.40 / 1M tokens
Per 1 million generated tokens
Verified Datasheet: Source: Moonshot AI Research Documentation • Effective Date: 14.08.2026
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