MoonshotAI: Kimi K2 0905

by Moonshot AI

Kimi K2 0905 is the September update of [Kimi K2 0711](moonshotai/kimi-k2). It is a large-scale Mixture-of-Experts (MoE) language model developed by Moonshot AI, featuring 1 trillion total parameters with 32 billion active per forward pass. It supports long-context inference up to 256k tokens, exten...

*Artificial Analysis‡Kilo Code Leaderboard†OpenRouter
Release Date
September 5, 2025
Context Window
262,144 tokens
Max Output
262,144 tokens
Input Modalities
text

Coding Performance

Coding benchmarks and performance metrics for development tasks

Coding Benchmarks

Artificial Analysis Coding Index

38.1%

Overall coding capability score

LiveCodeBench

61.0%

Real-world coding task performance

SciCode

30.7%

Scientific computing & algorithms

TerminalBench Hard

22.7%

CLI & terminal command generation

LCR (Long Context Reasoning)

52.3%

Understanding large codebases

IFBench

41.7%

Instruction following accuracy

Speed & Efficiency

Output Speed

62.3 tokens/sec

Median output tokens per second

Time to First Token

0.6s

Median responsiveness

Performance metrics from Artificial Analysis

Real-World Usage

Real-world usage statistics from the Kilo Code community

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Real-world metrics from the Kilo Code Leaderboard

Pricing

Cost per 1 million tokens

Input Tokens
$0.99
per 1M tokens
Output Tokens
$2.50
per 1M tokens
Blended (3:1 ratio)
$1.20
per 1M tokens

Example Cost

Analyzing a 10,000 line codebase (≈40k input tokens, 10k output tokens) costs approximately $0.0646

Coding Capabilities

Features and parameters relevant to coding tasks

Coding Features

Function Calling
Can call external functions/APIs
Tool Choice
Control over function selection
Structured Outputs
JSON schema validation
Reasoning Tokens
Extended thinking for complex problems

Pricing details from OpenRouter

Technical Details

Architecture and implementation specifications

Model ID
moonshotai/kimi-k2-0905
Created
September 4, 2025
Tokenizer
Other
Input Modalities
text
Context Window
262,144 tokens
Max Completion Tokens
262,144 tokens
Input Price
$0.99 per 1M tokens
Output Price
$2.50 per 1M tokens
Content Moderation
Disabled

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