MoonshotAI: Kimi K3.1 Pro

Name: Moonshot AI Kimi K3.1 Pro
Price: 2 USD
Availability: InStock
Author: Moonshot AI

moonshotai/kimi-k3.1-pro

Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model, a post-trained successor to Kimi K3 with a 1M-token context window. It accepts text, image and video input and is built for long-horizon coding, agentic tool use and visual software work.

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Input price: $2.00USD / 1M tokens
Output price: $10.00USD / 1M tokens
Context window: 1M
Max output: 131.1K

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Image URL or upload

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1M context131.1K max outputVision

Input$2.00/MOutput$10.00/MCache read$0.20/MCache write$2.00/M

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Model card

Specifications

Pricing

Input: $2 / 1M tokens
Output: $10 / 1M tokens
Cache read: $0.20 / 1M tokens
Cache write: $2 / 1M tokens

Context & modalities

Context window: 1,048,576 tokens
Max output: 131,072 tokens
Input: Text, image
Output: Text

Capabilities

Chat: Supported
Vision: Supported
Reasoning: Supported
Structured output: Supported
Function calling: Supported
Audio input: Not supported

Access

Provider: Moonshot AI
Model ID: moonshotai/kimi-k3.1-pro
Execution: sync
Base URL: https://api.sandbase.ai
API: Chat Completions API
Endpoint: /v1/chat/completions

Start building

Send your first request

OpenAI-compatible endpoint with unified authentication and usage tracking.

Production API

Chat Completions API endpoint

https://api.sandbase.ai/v1/chat/completions

Model ID

moonshotai/kimi-k3.1-pro

# The quoted heredoc keeps Unicode and shell metacharacters unchanged.
result=$(curl --fail-with-body --silent \
  -X POST "https://api.sandbase.ai/v1/chat/completions" \
  -H "Authorization: Bearer $SANDBASE_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary @- <<'SANDBASE_JSON'
{
  "model": "moonshotai/kimi-k3.1-pro",
  "messages": [
    {
      "role": "user",
      "content": "Hello"
    }
  ],
  "max_tokens": 2048
}
SANDBASE_JSON
)
printf '%s\n' "$result"

Choose your model

Compare models

All language models

Model	Context	Input / 1M	Output / 1M	Released
Kimi K3.1 ProThis model `Moonshot AI`	1M	$2.00	$10.00	Oct 23, 2026
Kimi K3 `Moonshot AI`	1M	$3.00	$15.00	Jul 26, 2026
Kimi K2.6 `Moonshot AI`	256K	$0.95	$4.00	Apr 20, 2026
Kimi K2.5 `Moonshot AI`	256K	$0.60	$3.00	Jan 27, 2026

Questions

FAQ

How do I call Moonshot AI Kimi K3.1 Pro through SandBase?

Create a SandBase API key, then send requests with the model ID "moonshotai/kimi-k3.1-pro" to Chat Completions API (/v1/chat/completions) at https://api.sandbase.ai. The request examples on this page show the exact payload.

How much does Moonshot AI Kimi K3.1 Pro cost?

$2 per 1M input tokens and $10 per 1M output tokens, billed per request from your SandBase balance. Discounts, when available, are shown in the pricing on this page.

What is the context window of Moonshot AI Kimi K3.1 Pro?

1M tokens of context, with up to 131.1K output tokens per response.

Which features does Moonshot AI Kimi K3.1 Pro support?

Moonshot AI Kimi K3.1 Pro supports vision (image input), reasoning, function calling, structured output. See Specifications above for the full list.

Do I need a separate Moonshot AI account?

No. One SandBase API key and balance gives you access to Moonshot AI Kimi K3.1 Pro and the other models in the catalog; you do not need to sign up with Moonshot AI separately.