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MoonshotAI: Kimi K3.1 Pro

moonshotai/kimi-k3.1-pro

text image videoContext 1.0M

Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model and a post-trained successor to Kimi K3, with a 1M-token context window. It is built for long-horizon coding, 3D...

Price

Input$2

per 1M tokens

Output$10

per 1M tokens

Cheaper on Inference.net (−10%) versus the lab price

Compare this model

Providers

Each row is one seller. Prices are the published rate from that source. A dash means that source did not publish the amount. Sorted by a 3:1 blend of input and output.

ProviderTagQuant InputOutput ContextUptimeStatusSource
Inference.net — — $1.8/1M $9/1M 1.0M — Listed inferencenet
AtlasCloud — int4 $2/1M $10/1M 1.0M — Listed atlascloud
Moonshot AI moonshotai/mxfp4 mxfp4 $2/1M $10/1M 1.0M 100% Live openrouter-endpoints
NEAR AI — — $2/1M $10/1M 1M — Listed nearai
Novita — — $2/1M $10/1M 1.0M — Listed novita
Moonshot AI moonshotai/highspeed mxfp4 $4/1M $20/1M 1.0M — Live openrouter-endpoints

Monthly bill

Token models use the token counts. Image, video, and audio models use units times the flat rate.

$12.00 at list price for this workload

Cache

Cache read$0.2

per 1M tokens

Every rate
UnitInputOutputFlatConfidence
token $2/1M $10/1M Not published— official

Price history

MoonshotAI: Kimi K3.1 Pro
15 0 2026-10-23: $22026-10-24: $22026-10-25: $22026-10-26: $22026-10-27: $22026-10-28: $22026-10-29: $22026-10-30: $2 2026-10-23 2026-10-30

input or flat output

Daily snapshots
UTC dateUnitInputOutputFlat
2026-10-23 token $2 $10 Not published—
2026-10-24 token $2 $10 Not published—
2026-10-25 token $2 $10 Not published—
2026-10-26 token $2 $10 Not published—
2026-10-27 token $2 $10 Not published—
2026-10-28 token $2 $10 Not published—
2026-10-29 token $2 $10 Not published—
2026-10-30 token $2 $10 Not published—

Alternatives

Parameters (13)
frequency_penaltyinclude_reasoninglogprobsmax_tokenspresence_penaltyreasoningreasoning_effortresponse_formatstopstructured_outputstool_choicetoolstop_logprobs
Call this model

OpenRouter id moonshotai/kimi-k3.1-pro. InferenceList does not send the request.

curl 
curl https://openrouter.ai/api/v1/chat/completions \
  -H "Authorization: Bearer $OPENROUTER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"model":"moonshotai/kimi-k3.1-pro","messages":[{"role":"user","content":"Hello"}]}'

JavaScript 
await fetch("https://openrouter.ai/api/v1/chat/completions", {
  method: "POST",
  headers: {
    Authorization: "Bearer " + process.env.OPENROUTER_API_KEY,
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    model: "moonshotai/kimi-k3.1-pro",
    messages: [{ role: "user", content: "Hello" }],
  }),
});

Python 
import os, json, urllib.request
req = urllib.request.Request(
    "https://openrouter.ai/api/v1/chat/completions",
    data=json.dumps({"model": "moonshotai/kimi-k3.1-pro", "messages": [{"role": "user", "content": "Hello"}]}).encode(),
    headers={"Authorization": "Bearer " + os.environ["OPENROUTER_API_KEY"], "Content-Type": "application/json"},
)
print(urllib.request.urlopen(req).read().decode())

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