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Kimi K2 0905

MoonshotAI· released 4 Sept 2025

moonshotai/kimi-k2-0905
Input / 1M tokens
$0.6
Output / 1M tokens
$2.5
Context window262K tokens

Longest answer: 98K tokens

reads textopen weightstool calling
See it on openrouter.ai

About

Kimi K2 0905 is MoonshotAI’s text-input, text-output model, with a 262,144-token context window and a maximum output of 98,304 tokens. It has open weights and tool support. The supplied summary identifies it as a September update to Kimi K2 0711 and describes a large-scale mixture-of-experts model with 1 trillion total parameters. Its model ID is moonshotai/kimi-k2-0905, and its Hugging Face ID is moonshotai/Kimi-K2-Instruct-0905. It was released on 2025-09-04. Listed rates are USD 0.6 per 1M input tokens and USD 2.5 per 1M output tokens. The official page is on OpenRouter. Builders assessing it for a text-based stack can weigh the open weights, tool support, context and output limits against the separate input and output prices.

Who it is for

It suits teams working with text inputs and outputs that want tool support and open weights. The listed context and output limits, alongside separate token rates, help scope its potential fit and cost.

What is good

  • Open weights are available.
  • Supports tools.
  • Context window is 262,144 tokens.
  • Maximum output is 98,304 tokens.
  • Accepts text input and produces text.

What to know first

  • Input costs USD 0.6 per 1M tokens.
  • Output costs USD 2.5 per 1M tokens.
  • No image input is listed.

Verdict

Kimi K2 0905 is a text model with tools, open weights, and a substantial context window. Its listed output price is higher than its input price, so output-heavy workloads warrant attention.

Details

Lab
MoonshotAIopenrouter.ai · 3 Oct 2026
Context
262Kopenrouter.ai · 3 Oct 2026
Input price
$0.6 / 1Mopenrouter.ai · 3 Oct 2026
Output price
$2.5 / 1Mopenrouter.ai · 3 Oct 2026
Max output
98,304 tokensopenrouter.ai · 3 Oct 2026
Inputs
textopenrouter.ai · 3 Oct 2026
Open weights
Yesopenrouter.ai · 3 Oct 2026

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Listed on Inferse

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