Get cost & usage details (streaming)

Get cost & usage details (streaming)

post

Get cost details and usage details in every call

Header parameters

AuthorizationstringRequiredExample: sk-Yf4DN

Body

application/json

modelstringRequired

streambooleanOptionalDefault: false

Responses

200Success

application/json

choicesstring[]Required

costnumberRequired

createdintegerRequired

idstringRequired

modelstringRequired

objectstringRequired

request_idstringRequired

system_fingerprintstringRequired

post

/v1/chat/completions

HTTPcURLJavaScriptPython

POST /v1/chat/completions HTTP/1.1
Host: llm.onerouter.pro
Authorization: text
Content-Type: application/json
Accept: */*
Content-Length: 149

{
  "model": "x-ai/grok-4.1-fast-reasoning",
  "messages": [
    {
      "role": "user",
      "content": "What is the meaning of life?"
    }
  ],
  "usage": {
    "include": true
  },
  "stream": true
}

200Success

{
  "choices": [],
  "cost": 0.000129,
  "cost_details": {
    "audio_cost": 0,
    "byok_cost": 0,
    "completion_cost": 0.0001205,
    "discount_rate": 1,
    "image_cost": 0,
    "is_byok": false,
    "native_web_search_cost": 0,
    "plugin_web_search_cost": 0,
    "prompt_cache_read_cost": 0.0000081,
    "prompt_cache_write_1_h": 0,
    "prompt_cache_write_5_min": 0,
    "prompt_cache_write_cost": 0,
    "prompt_cost": 2e-7,
    "reasoning_cost": 0,
    "tools_cost": 0,
    "video_cost": 0
  },
  "created": 1773739158,
  "id": "977d1c37-be86-2959-a46c-179037266417",
  "model": "x-ai/grok-4.1-fast-reasoning",
  "object": "chat.completion.chunk",
  "request_id": "ead48490de8b48b49e9f960c2158ff26",
  "system_fingerprint": "fp_24359ef476",
  "usage": {
    "completion_tokens": 241,
    "completion_tokens_details": {
      "audio_tokens": 0,
      "image_tokens": 0,
      "reasoning_tokens": 204
    },
    "prompt_tokens": 163,
    "prompt_tokens_details": {
      "audio_tokens": 0,
      "cache_write_tokens": 0,
      "cached_tokens": 162,
      "video_tokens": 0
    },
    "total_tokens": 404
  }
}