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Moonshot: Kimi K2 0905

kimi-k2-instruct-0905

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Kimi K2 0905 costs $0.520 per million input tokens and $2.34 per million output tokens, supports 262K context, and is available through the OpenAI-compatible API.

Kimi K2 0905. Kimi-k2 is a Mixture-of-Experts (MoE) foundation model with exceptional coding and agent capabilities, featuring 1 trillion total parameters and 32 billion activated parameters. In benchmark evaluations covering general knowledge reasoning, programming, mathematics, and agent-related tasks, the K2 model outperforms other leading open-source models. Quantized at FP8.

Modalities

Text → Text

Input / output price

$0.520 / $2.34 per 1M

Context

262K · max output 100K

Capabilities

Tool callingLong contextOpen weights

Pricing

Billed per token actually used and deducted from your credits.

ItemUSD per 1M tokens
Input$0.520
Output$2.34
Cached input$0.260

Calculator

Drag the sliders to estimate what this model will cost.

Per request
$0.00343
Per day
$1.72
Per month (30 days)
$51.48

Kimi K2 0905: input $0.52/M · output $2.34/M · cached input $0.26/M

Request with these settings
curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model": "kimi-k2-instruct-0905", "max_tokens": 800,
       "messages": [{"role": "user", "content": "…"}]}'

Code samples

OpenAI-compatible. Set the base URL to https://api.geniusrelaygpt.com/v1 and the model to kimi-k2-instruct-0905.

curl https://api.geniusrelaygpt.com/v1/chat/completions \
  -H "Authorization: Bearer $API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "kimi-k2-instruct-0905",
    "stream": true,
    "messages": [{"role": "user", "content": "Hello"}]
  }'

Use it in a client: Cursor · Cline · SillyTavern · Codex

Parameters

Common OpenAI parameters can be passed as-is.

temperaturetop_pmax_tokensstreamstoppresence_penaltyfrequency_penaltyseed

FAQ

How is Kimi K2 0905 billed?
Input is $0.520 and output is $2.34 per million tokens; cached input is $0.260. The charge for every request is listed in Usage Logs in the console.
How long is the context window?
262K tokens. In a long conversation every turn is billed for the full input, so keep the history under control.
Does it support streaming?
Yes. Add "stream": true to the request to receive server-sent events in the OpenAI format.
Kimi K2 0905 API pricing · GeniusRelay