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Kimi K3.1 Pro

kimi-k3.1-pro

Kimi K3.1 Pro is Moonshot AI's flagship open-weight multimodal reasoning model, building on Kimi K3 with enhanced post-training for advanced reasoning and autonomous task execution. It features a 1M-token context window and native image and video understanding, enabling complex, long-context multimodal workflows. Optimized for long-horizon coding, 3D creation, financial research, and end-to-end agentic knowledge work, Kimi K3.1 Pro is well suited for autonomous software engineering, multimodal analysis, and complex professional workflows that require sustained reasoning and reliable execution.

Context
1M tokens
Endpoint

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Pricing

Input$2.00 / 1M
Output$10.00 / 1M
Cache Write (5m)$2.00 / 1M
Cache Write (1h)$2.00 / 1M
Cache Read$2.00 / 1M
Web Search$0 / 1M

Quick Start

Select an endpoint and copy a working example for this model.

Endpoint
python
from openai import OpenAI client = OpenAI(    api_key="YOUR_API_KEY",    base_url="https://api.apertis.ai/v1") response = client.chat.completions.create(    model="kimi-k3.1-pro",    messages=[        {"role": "user", "content": "Hello!"}    ],    max_tokens=1024,    temperature=0.7) print(response.choices[0].message.content) # Optional: Enable context compression to reduce token usage# response = client.chat.completions.create(#     model="kimi-k3.1-pro",#     messages=[{"role": "user", "content": "Hello!"}],#     extra_body={"compression": {"enabled": True, "model": "gpt-4.1-mini"}}# )

Supported Parameters

API docs
Common7 params
modelmessagesmax_tokenstemperaturetop_pstreamtools
Extended4 params
reasoning_effortstream_optionsthinkingextra_body

Cursor IDE Model IDs

Use these namespaced identifiers in Cursor IDE to avoid conflicts with built-in models.

kimi-k3.1-pro

Questions about Kimi K3.1 Pro

How much does Kimi K3.1 Pro cost on Apertis?

Kimi K3.1 Pro costs $2.00 per 1M input tokens and $10.00 per 1M output tokens on Apertis.

What is Kimi K3.1 Pro's context window?

Kimi K3.1 Pro has a context window of 1M tokens.

Which company develops Kimi K3.1 Pro?

Kimi K3.1 Pro is developed by MoonShot AI.

Which model ID do I use to call Kimi K3.1 Pro?

Use the model ID kimi-k3.1-pro to call Kimi K3.1 Pro.

Compare with Other Models

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