Text to Music (Chat format)

POST

https://api.key4u.vn/v1/chat/completions

Unified OpenAI compatible portal. Select the upstream via model, for example:

gpt-4o / gpt-4o-audio-preview → OpenAI

gemini-2.5-flash-all → Google Gemini (compatible format)

For other models see GET /v1/models

OpenAI official documentation: https://platform.openai.com/docs/api-reference/chat/create

The model name format is: gpt-4-gizmo-*, and the system will automatically identify it.

For example, this GPTs: https://chatgpt.com/g/g-B3hgivKK9-write-for-me

Then its model name should be filled in as: gpt-4-gizmo-g-B3hgivKK9

List of GPTs: https://chatgpt.com/gpts

Request

Authorization

Provide your bearer token in the

Authorization

header when making requests to protected resources.

Example:

Authorization: Bearer ********************

Body Params application/jsonRequired

Examples

Responses

🟢200

application/json

Bodyapplication/json

🟠400Bad request or validation failed

🟠401Missing or invalid API Key

Request Example

Shell

JavaScript

Java

Swift

curl --location 'https://api.key4u.vn/v1/chat/completions' \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
  "extra_body": {
    "enable_thinking": true
  },
  "messages": [
    {
      "content": "There are three boxes, and only one contains a prize. You choose box 2. The host opens box 3 (empty) and asks whether you want to switch to box 1. Analyze the situation and provide a recommendation.",
      "role": "user"
    }
  ],
  "model": "deepseek-chat",
  "stream": true,
  "stream_options": {
    "include_usage": true
  }
}'

Response Example

200 - example

{
  "choices": [
    {
      "finish_reason": "stop",
      "index": 0,
      "logprobs": "",
      "message": {
        "annotations": [],
        "content": "\n\nHello there, how may I assist you today?",
        "refusal": "",
        "role": "assistant"
      }
    }
  ],
  "created": 1677652288,
  "id": "chatcmpl-123",
  "model": "gpt-4o",
  "object": "chat.completion",
  "service_tier": "default",
  "system_fingerprint": "fp_abc123",
  "usage": {
    "completion_tokens": 12,
    "completion_tokens_details": {
      "accepted_prediction_tokens": 0,
      "audio_tokens": 0,
      "reasoning_tokens": 0,
      "rejected_prediction_tokens": 0
    },
    "latency_checkpoint": {
      "engine_tbt_ms": 0,
      "engine_ttft_ms": 0,
      "engine_ttlt_ms": 0,
      "pre_inference_ms": 0,
      "service_tbt_ms": 0,
      "service_ttft_ms": 0,
      "service_ttlt_ms": 0,
      "total_duration_ms": 0,
      "user_visible_ttft_ms": 0
    },
    "prompt_tokens": 9,
    "prompt_tokens_details": {
      "audio_tokens": 0,
      "cached_tokens": 0
    },
    "total_tokens": 21
  }
}

Modified at 2026-10-13 12:32:40

Speech Synthesis

Reorder