Kimi K3.1 Pro Highspeed

Kimi K3.1 Pro Highspeed is the faster-serving variant of Moonshot AI's Kimi K3.1 Pro, a multimodal reasoning model built for long-horizon coding, 3D creation and agentic work.

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input · usd / 1m tok

$4.00

output · usd / 1m tok

$20.00

context window

1.05mtokens

modalities · in → out

pricing

base api ratesusd per 1m tokens

input: $4.00
output: $20.00
cache read: $0.20

providers

Moonshot AI hosts Kimi K3.1 Pro Highspeed. Impossibl routes your request intelligently and handles failover automatically when a provider is down.

Moonshot AI

specifications

takes text and image in, gives text outmoonshotai/kimi-k3.1-pro-highspeed

creatorMoonshot AI
model typeText generation
context window1,048,576 tokens
maximum outputnot published
input
takes text and image in, gives text out
outputtext
tool callingnot verified
releasedoct 23, 2026
endpoint/v1/chat/completions

unknown means the public catalog does not establish that fact. a model's documented capabilities can differ from what a particular api supports. see the model documentation for integration details.

try it · your prompt, this model, live

# responses API
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["IMPOSSIBL_API_KEY"],
    base_url="https://api.impossibl.com/v1",
)

resp = client.responses.create(
    model="moonshotai/kimi-k3.1-pro-highspeed",
    input="▌",
)
print(resp.output_text)

edit the prompt, then run

# responses API
import os
from openai import OpenAI

client = OpenAI(
    api_key=os.environ["IMPOSSIBL_API_KEY"],
    base_url="https://api.impossibl.com/v1",
)

resp = client.responses.create(
    model="moonshotai/kimi-k3.1-pro-highspeed",
    input="▌",
)
print(resp.output_text)

edit the prompt, then run

benchmarks

benchmark results are not available for this model yet.

compare Kimi K3.1 Pro Highspeed with other models

frontier labs and open weights, best-ranked firstusd / 1m tok · in / out

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frequently asked questions

What is Kimi K3.1 Pro Highspeed?

Kimi K3.1 Pro Highspeed is the faster-serving variant of Moonshot AI's Kimi K3.1 Pro, a multimodal reasoning model built for long-horizon coding, 3D creation and agentic work. It delivers the same capabilities at roughly two to three times the output speed, suiting coding agents and interactive use where latency matters.

How much does Kimi K3.1 Pro Highspeed cost?

Kimi K3.1 Pro Highspeed costs $4.00 per million input tokens and $20.00 per million output tokens through the Impossibl API. Cache reads cost $0.20 per million tokens. All rates are in USD.

view the pricing table ↑

What is the context length of Kimi K3.1 Pro Highspeed?

Kimi K3.1 Pro Highspeed has a 1,048,576-token context window through the Impossibl API.

What inputs and outputs does Kimi K3.1 Pro Highspeed support?

Kimi K3.1 Pro Highspeed accepts text and image as input. Kimi K3.1 Pro Highspeed returns text.

How do I use Kimi K3.1 Pro Highspeed through an API?

Kimi K3.1 Pro Highspeed is available through the Impossibl API. Use moonshotai/kimi-k3.1-pro-highspeed as the model identifier with /v1/chat/completions. The quickstart explains how to create an API key and send your first request.

follow the api quickstart →

When was Kimi K3.1 Pro Highspeed released?

Moonshot AI released Kimi K3.1 Pro Highspeed on October 23, 2026.

Creator release announcement ↗

this page describes Kimi K3.1 Pro Highspeed as listed by the impossibl public api. prices and availability come from that catalog, refreshed here every five minutes. this is an impossibl offering, not a comparison of independent hosting-provider quotes. model descriptions and release dates, where available, use the creator sources linked under the answers above.

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