Antimatter
Moonshot

Kimi K3.1 Pro (batch)

moonshotai/kimi-k3.1-pro:batch

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.

$0.4488 in · $6.7221 out per 1M tokens1M contextOct 23, 2026

about 0.4¢ a message

A typical message: about 500 tokens you send and 500 it writes.

Chat with Kimi K3.1 Pro (batch)
Call it from codeLock this price

Also:Kimi K3.1 Pro

Spec sheet

Published facts from the catalog, billed prices and what we measured here. Anything not measured says so.

Price, billed here

Input, per 1M tokens
$0.4488provider $0.408
Output, per 1M tokens
$6.7221provider $6.111
Cached input, per 1M
$0.143provider $0.13
Margin
+10%

Context and formats

Context window
1,048,576 tokens
Longest answer
943,718 tokens
Reads
text, images, and video
Makes
text
First listed
2026-10-23

Measured here, last 7 days

First token, median
not measured
Answered without error
not measured

Tools and JSON

Tool calling
not declared
JSON output
not declared

Price and latency history as JSON: GET /api/planet/history?id=moonshotai/kimi-k3.1-pro:batch.

About

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...

In Moonshot's words.

Try it here

The answer appears here.

Measured here

Call it

Use one OpenAI compatible endpoint, this model's id and an am_live_ key from the dashboard. You can also try it in chat first with no key.

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

Everything else is in the docs.

Embed this

A badge showing this model's live price per million tokens, as billed here, for a README or a site. It links back to this page.

Kimi K3.1 Pro (batch) price on Antimatter
<a href="https://useantimatter.com/planet/moonshotai/kimi-k3.1-pro%3Abatch"><img src="https://useantimatter.com/api/badge/price?id=moonshotai%2Fkimi-k3.1-pro%3Abatch" alt="Kimi K3.1 Pro (batch) price on Antimatter" height="28"></a>

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