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Kimi K2.5

Moonshot AIReleased Jan 27, 2026

Kimi K2.5 is Moonshot AI's native multimodal model, delivering state-of-the-art visual coding capability and a self-directed agent swarm paradigm. Built on Kimi K2 with continued pretraining over approximately 15T mixed...

Try in playground
Context window
262K tokens
Input
text, image
Output
text
Tokenizer
Other
Released
Jan 27, 2026
Reasoning
optional

Pricing

Per 1M tokens. The provider price and our flat 3% fee are separate columns — what you pay is their sum.

Per 1M tokensProvider+ 3% feeYou pay
Input$0.375$0.011$0.386
Output$2.02$0.061$2.09

Benchmarks

Design Arena

CategoryEloWin rateRank
androidnativeagents113257.8%#17
Full-stackagents118254.2%#14
godotgamedevagents125459.5%#2
Mobile appsagents118649.3%#20
Web appsagents119450.3%#15
3Dmodels128654%#22
ASCII artmodels121447%#17
Codemodels128654.7%#20
Data vizmodels127052.9%#21
Game devmodels127253.7%#23
SVGmodels121050.2%#25
UI componentsmodels129054.2%#19
Websitesmodels129155.9%#16

Head-to-head preference voting. How we filter and rank

Supported parameters

  • frequency_penalty
  • include_reasoning
  • logit_bias
  • logprobs
  • max_tokens
  • min_p
  • presence_penalty
  • reasoning
  • repetition_penalty
  • response_format
  • seed
  • stop
  • structured_outputs
  • temperature
  • tool_choice
  • tools
  • top_k
  • top_logprobs
  • top_p

Call it

OpenAI-compatible: point your SDK at api.openkey.ai/v1 and use model moonshotai/kimi-k2.5.

Code sample language
curl https://api.openkey.ai/v1/chat/completions \
  -H "Authorization: Bearer $OPENKEY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "moonshotai/kimi-k2.5",
    "messages": [{"role": "user", "content": "Hello"}]
  }'
import os
from openai import OpenAI

client = OpenAI(
    base_url="https://api.openkey.ai/v1",
    api_key=os.environ["OPENKEY_API_KEY"],
)

completion = client.chat.completions.create(
    model="moonshotai/kimi-k2.5",
    messages=[{"role": "user", "content": "Hello"}],
)
print(completion.choices[0].message.content)
import OpenAI from "openai";

const client = new OpenAI({
  baseURL: "https://api.openkey.ai/v1",
  apiKey: process.env.OPENKEY_API_KEY,
});

const completion = await client.chat.completions.create({
  model: "moonshotai/kimi-k2.5",
  messages: [{ role: "user", content: "Hello" }],
});
console.log(completion.choices[0].message.content);

Questions

How much does Kimi K2.5 cost via API?
Through OpenKey, Kimi K2.5 costs $0.386 per 1M input tokens and $2.09 per 1M output tokens. That is the provider price ($0.375 / $2.02) plus a flat 3% fee — nothing else.
What is Kimi K2.5's context window?
Kimi K2.5 accepts up to 262K tokens of context.
Is Kimi K2.5 OpenAI-compatible?
Yes. Send requests to OpenKey's /v1/chat/completions endpoint with model "moonshotai/kimi-k2.5" using any OpenAI SDK — only the base URL and API key change.
What inputs does Kimi K2.5 support?
Kimi K2.5 accepts text, image input and produces text output.

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