Kimi K3.1 Pro

moonshotai/kimi-k3.1-pro

A chat model with a 1M-token context window, at $2.10 per million input tokens and $10.50 per million output tokens.

Details

Maker: moonshotai
Kind: Chat
Context window: 1,048,576 tokens
Max output: 1,048,576 tokens
Input: $2.10 per million tokens
Cached input: $0.21 per million tokens, 90% off
Cache write: $2.10 per million tokens
Output: $10.50 per million tokens
Capabilities: Reasoning, tool use, vision
Takes: Text, image
Returns: Text
Zero data retention: Yes, on every provider
No training on requests: Yes, on every provider
Released: 2026-10-23

Description

Kimi K3.1 Pro is a frontier model from Moonshot AI for complex reasoning, coding, and agentic workflows, with support for vision, tool use, structured outputs, and long-context tasks.

Call it

curl

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

Set PHANTOM_KEY to your key. Any OpenAI client works with the base URL https://phantom.codes/v1.

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