Kimi K3.1 Pro

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 creation, financial research, and end-to-end agentic knowledge work, with native image and video understanding.

ChatMoonshot1M tokens$2.1801 / $10.9006 · 1M

moonshotai/kimi-k3.1-pro

Context
1M tokens
Completion cap
943,718
Tools
Yes
JSON
Yes
Released
2026-10-23

Call it from Geek Hub

Same OpenAI SDK. Change the base URL and the model id.

curl https://api.geekhub.mx/v1/chat/completions \
  -H "Authorization: Bearer $GEEKHUB_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "model": "moonshotai/kimi-k3.1-pro",
    "messages": [{"role": "user", "content": "Hola"}]
  }'
Get an API key

Frequently asked questions

What is Kimi K3.1 Pro?
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 creation, financial research, and end-to-end agentic knowledge work, with native image and video understanding. Kimi K3.1 Pro runs on the Geek Hub API (OpenAI-compatible). Model id: moonshotai/kimi-k3.1-pro.
Is Kimi K3.1 Pro free?
No. Input is $2.1801 per 1M tokens and output is $10.9006 per 1M tokens on Geek Hub (markup included).
What is the context length of Kimi K3.1 Pro?
Kimi K3.1 Pro has a 1M tokens context window. It supports up to 943,718 completion tokens.
Does Kimi K3.1 Pro support tool calling and structured outputs?
Kimi K3.1 Pro accepts tools and tool_choice for function calling. It also supports structured outputs via a JSON schema in response_format.
When was Kimi K3.1 Pro released?
Kimi K3.1 Pro was released on 2026-10-23.

More models from Moonshot