kimi-k3.1-pro / kimi-k3.1-pro-highspeed

curl --request POST \
  --url https://www.anyfast.ai/v1/chat/completions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "kimi-k3.1-pro",
  "reasoning_effort": "high",
  "messages": [
    {
      "role": "user",
      "content": "Explain how to review a large codebase safely."
    }
  ]
}
'

{
  "id": "<string>",
  "object": "chat.completion",
  "model": "<string>",
  "choices": [
    {
      "index": 123,
      "message": {
        "role": "system",
        "content": "<string>",
        "name": "<string>",
        "partial": true,
        "reasoning_content": "<string>",
        "tool_calls": [
          {
            "id": "<string>",
            "type": "function",
            "function": {
              "name": "<string>",
              "arguments": "<string>"
            }
          }
        ],
        "tool_call_id": "<string>"
      },
      "finish_reason": "<string>"
    }
  ],
  "created": 123,
  "usage": {}
}

{
  "error": {}
}

{
  "error": {}
}

{
  "error": {}
}

POST

chat

completions

curl --request POST \
  --url https://www.anyfast.ai/v1/chat/completions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "model": "kimi-k3.1-pro",
  "reasoning_effort": "high",
  "messages": [
    {
      "role": "user",
      "content": "Explain how to review a large codebase safely."
    }
  ]
}
'

{
  "id": "<string>",
  "object": "chat.completion",
  "model": "<string>",
  "choices": [
    {
      "index": 123,
      "message": {
        "role": "system",
        "content": "<string>",
        "name": "<string>",
        "partial": true,
        "reasoning_content": "<string>",
        "tool_calls": [
          {
            "id": "<string>",
            "type": "function",
            "function": {
              "name": "<string>",
              "arguments": "<string>"
            }
          }
        ],
        "tool_call_id": "<string>"
      },
      "finish_reason": "<string>"
    }
  ],
  "created": 123,
  "usage": {}
}

{
  "error": {}
}

{
  "error": {}
}

{
  "error": {}
}

Kimi K3.1 Pro and Kimi K3.1 Pro Highspeed use the same OpenAI-compatible Chat Completions request. Both models provide a 1,048,576-token context window, always-on reasoning, multimodal input, streaming, structured output, Partial Mode, and function tools.

Set reasoning_effort at the top level to low, high, or max. K3.1 models do not use the K2.x thinking object. Sampling parameters are fixed; omit temperature, top_p, n, presence_penalty, and frequency_penalty.

Authorizations

Authorization

string

header

required

Bearer authentication header of the form Bearer <token>, where <token> is your auth token.

Body

application/json

model

enum<string>

required

Kimi K3.1 model ID.

Available options:

kimi-k3.1-pro,

kimi-k3.1-pro-highspeed

messages

object[]

required

Minimum array length: 1

Show child attributes

reasoning_effort

enum<string>

default:max

Available options:

low,

high,

max

max_completion_tokens

integer

default:131072

Required range: 1 <= x <= 1048576

stream

boolean

default:false

stream_options

object

Show child attributes

response_format

object

Show child attributes

stop

tools

object[]

Show child attributes

tool_choice

enum<string>

default:auto

Available options:

auto,

none,

required

prompt_cache_key

string

safety_identifier

string

Response

Chat completion generated successfully.

string

required

object

enum<string>

required

Available options:

chat.completion

model

string

required

choices

object[]

required

Show child attributes

created

integer

usage

object

Overview

Native Compatible Endpoints

Model APIs

kimi-k3.1-pro / kimi-k3.1-pro-highspeed

Authorizations

Body

Response