# Qwen3.8 Max 0902 — /chat/completions

OpenAI-compatible chat completions backed by Qwen3.8 Max 0902, a pinned Qwen3.8 Max snapshot for reproducible output. It always thinks; the reasoning returns in message.reasoning_content and reasoning tokens are billed at the output rate within usage.completion_tokens. A repeated long prefix hits the cache automatically and that part settles at the cache rate. Tool calling, streaming and image input (as base64 data URIs) are supported. Set model to qwen3.8-max-0902; served on /v1/chat/completions only.

**Endpoint:** `POST https://nezhagate.com/v1/chat/completions`

## Authentication
```
Authorization: Bearer YOUR_API_KEY
Content-Type: application/json
```

## Request body
| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `model` | string | Yes | Model ID, here qwen3.8-max-0902. |
| `messages` | array | Yes | Array of messages; each has role (system/user/assistant) and content. content may be a string, or an array of {type:text} and {type:image_url} parts for image understanding (multimodal/vision). |
| `stream` | boolean | No | Stream the response as SSE. Default false. |
| `temperature` | number | No | Sampling temperature, 0–2. |
| `max_tokens` | integer | No | Maximum number of tokens to generate. |
| `web_search` | boolean | No | Set true to enable web search: the gateway augments the prompt with live results (citing sources) before the model answers. Can also be triggered via a tools entry {"type":"web_search"}. |

## Request example
```bash
curl https://nezhagate.com/v1/chat/completions -H "Authorization: Bearer YOUR_API_KEY" -H "Content-Type: application/json" -d '{"model": "qwen3.8-max-0902", "messages": [{"role": "user", "content": "Hello"}], "stream": false}'
```

## Response
```json
{
  "id": "chatcmpl_xxx",
  "object": "chat.completion",
  "model": "qwen3.8-max-0902",
  "choices": [
    {
      "index": 0,
      "message": {
        "role": "assistant",
        "reasoning_content": "The user is greeting me, so a short friendly reply fits...",
        "content": "Hello! How can I help you today?"
      },
      "finish_reason": "stop"
    }
  ],
  "usage": {
    "prompt_tokens": 9,
    "completion_tokens": 42,
    "total_tokens": 51,
    "completion_tokens_details": {"reasoning_tokens": 31}
  }
}
```

## Image input (Vision)
Put an image in the message content array and the model will analyze it (visual Q&A, reading text / OCR, …). image_url accepts a public image link or an inline base64 data URL (data:image/png;base64,...). Available on multimodal models (gpt-5.5, gemini series, …).

```bash
curl https://nezhagate.com/v1/chat/completions -H "Authorization: Bearer YOUR_API_KEY" -H "Content-Type: application/json" -d '{"model": "qwen3.8-max-0902", "messages": [{"role": "user", "content": [{"type": "text", "text": "What is in this image?"}, {"type": "image_url", "image_url": {"url": "https://example.com/photo.jpg"}}]}]}'
```