Kimi K3 API — pricing & specs
Kimi K3 is a text model from Moonshot AI with a maker-documented 1,048,576-token (1M) context window. On KeepRouter, Kimi K3 costs $3.00 per 1M input tokens and $15.00 per 1M output tokens, billed pay-as-you-go with no monthly fee. Call it through a compatible KeepRouter endpoint supported by its active route, with the model id kimi-k3.
| Maker | Moonshot AI |
|---|---|
| Modality | Text |
| Context window | 1,048,576 tokens |
| Input price | $3.00 per 1M tokens |
| Output price | $15.00 per 1M tokens |
| Cached input | $0.3000 per 1M tokens |
| Capabilities | Chat completions, Streaming where supported, Tool calling where supported |
| Endpoint | POST /v1/chat/completions or POST /v1/messages (compatible chat routes) |
| Model id | kimi-k3 |
How pricing works for Kimi K3
Kimi K3 is billed per token — $3.00 per 1M input tokens and $15.00 per 1M output tokens, with cached input at $0.3000 per 1M tokens. The published price is pay-as-you-go, with no monthly fee; actual request cost depends on measured token usage.
Calling Kimi K3 on KeepRouter
Point a compatible client at the supported KeepRouter endpoint and set the model to kimi-k3. KeepRouter preserves the client-facing request shape while handling upstream routing or translation. Use POST /v1/chat/completions or, on compatible chat routes, POST /v1/messages; streaming and tool support depend on the model's active route.
cURL
curl https://keeprouter.com/v1/chat/completions \
-H "Authorization: Bearer $KEEPROUTER_KEY" -H "Content-Type: application/json" \
-d '{"model":"kimi-k3","messages":[{"role":"user","content":"Hello"}]}'Python
from openai import OpenAI
client = OpenAI(base_url="https://keeprouter.com/v1", api_key="$KEEPROUTER_KEY")
r = client.chat.completions.create(model="kimi-k3", messages=[{"role":"user","content":"Hello"}])JavaScript
import OpenAI from "openai";
const client = new OpenAI({ baseURL: "https://keeprouter.com/v1", apiKey: process.env.KEEPROUTER_KEY });
const r = await client.chat.completions.create({ model: "kimi-k3", messages: [{ role: "user", content: "Hello" }] });Guides
Related models from Moonshot AI
- Kimi K2.5 — $0.6000 per 1M input tokens and $3.00 per 1M output tokens
- Kimi K2.6 — $0.6800 per 1M input tokens and $3.41 per 1M output tokens
- Kimi K2.7 Code (High-Speed) — $0.9500 per 1M input tokens and $8.00 per 1M output tokens
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Prices as of 2026-07-17.